9. LIGHT REFLECTION AND REFRACTION-A&R-1

Assertion: Absolute refractive index is commonly represented by n. Reason: Power is measured in dioptres. Assertion: Absolute refractive index is commonly represented by n. Reason: Power is measured in dioptres.

1 Mark(s)

Both Assertion and Reason are true, and Reason is the correct explanation of Assertion.
Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
Assertion is true, but Reason is false. Assertion is true, but Reason is false.
Assertion is false, but Reason is true. Assertion is false, but Reason is true.

Assertion: A plane-mirror image is laterally inverted. Reason: A plane-mirror image is never laterally inverted. Assertion: A plane-mirror image is laterally inverted. Reason: A plane-mirror image is never laterally inverted.

1 Mark(s)

Both Assertion and Reason are true, and Reason is the correct explanation of Assertion.
Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
Assertion is true, but Reason is false. Assertion is true, but Reason is false.
Assertion is false, but Reason is true. Assertion is false, but Reason is true.

Assertion: For small-aperture mirrors, f = 2R. Reason: For small-aperture mirrors, R = 2f. Assertion: For small-aperture mirrors, f = 2R. Reason: For small-aperture mirrors, R = 2f.

1 Mark(s)

Both Assertion and Reason are true, and Reason is the correct explanation of Assertion.
Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
Assertion is true, but Reason is false. Assertion is true, but Reason is false.
Assertion is false, but Reason is true. Assertion is false, but Reason is true.

Assertion: A concave mirror can be used in solar furnaces. Reason: A solar furnace uses a concave mirror because it scatters sunlight. Assertion: A concave mirror can be used in solar furnaces. Reason: A solar furnace uses a concave mirror because it scatters sunlight.

1 Mark(s)

Both Assertion and Reason are true, and Reason is the correct explanation of Assertion.
Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
Assertion is true, but Reason is false. Assertion is true, but Reason is false.
Assertion is false, but Reason is true. Assertion is false, but Reason is true.

Assertion: A ray parallel to the principal axis of a concave mirror passes through F after reflection. Reason: The principal focus of a concave mirror is the point where reflected parallel rays meet. Assertion: A ray parallel to the principal axis of a concave mirror passes through F after reflection. Reason: The principal focus of a concave mirror is the point where reflected parallel rays meet.

1 Mark(s)

Both Assertion and Reason are true, and Reason is the correct explanation of Assertion.
Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
Assertion is true, but Reason is false. Assertion is true, but Reason is false.
Assertion is false, but Reason is true. Assertion is false, but Reason is true.

Assertion: A plane mirror always forms a real image. Reason: A plane mirror always forms a virtual image. Assertion: A plane mirror always forms a real image. Reason: A plane mirror always forms a virtual image.

1 Mark(s)

Both Assertion and Reason are true, and Reason is the correct explanation of Assertion.
Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
Assertion is true, but Reason is false. Assertion is true, but Reason is false.
Assertion is false, but Reason is true. Assertion is false, but Reason is true.

Assertion: Light travels faster in a denser medium. Reason: Light travels faster in an optically rarer medium. Assertion: Light travels faster in a denser medium. Reason: Light travels faster in an optically rarer medium.

1 Mark(s)

Both Assertion and Reason are true, and Reason is the correct explanation of Assertion.
Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
Assertion is true, but Reason is false. Assertion is true, but Reason is false.
Assertion is false, but Reason is true. Assertion is false, but Reason is true.

Assertion: A rectangular glass slab causes no lateral shift. Reason: The emergent ray can be shifted sideways even though it is parallel to the incident direction. Assertion: A rectangular glass slab causes no lateral shift. Reason: The emergent ray can be shifted sideways even though it is parallel to the incident direction.

1 Mark(s)

Both Assertion and Reason are true, and Reason is the correct explanation of Assertion.
Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
Assertion is true, but Reason is false. Assertion is true, but Reason is false.
Assertion is false, but Reason is true. Assertion is false, but Reason is true.

Assertion: Distances to the left of the origin are negative. Reason: Distances to the left of the origin are always positive. Assertion: Distances to the left of the origin are negative. Reason: Distances to the left of the origin are always positive.

1 Mark(s)

Both Assertion and Reason are true, and Reason is the correct explanation of Assertion.
Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
Assertion is true, but Reason is false. Assertion is true, but Reason is false.
Assertion is false, but Reason is true. Assertion is false, but Reason is true.

Assertion: A concave lens has negative power. Reason: Its focal length is negative under the New Cartesian sign convention. Assertion: A concave lens has negative power. Reason: Its focal length is negative under the New Cartesian sign convention.

1 Mark(s)

Both Assertion and Reason are true, and Reason is the correct explanation of Assertion.
Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
Assertion is true, but Reason is false. Assertion is true, but Reason is false.
Assertion is false, but Reason is true. Assertion is false, but Reason is true.

Assertion: A concave lens diverges light rays. Reason: A concave lens always converges light rays. Assertion: A concave lens diverges light rays. Reason: A concave lens always converges light rays.

1 Mark(s)

Both Assertion and Reason are true, and Reason is the correct explanation of Assertion.
Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
Assertion is true, but Reason is false. Assertion is true, but Reason is false.
Assertion is false, but Reason is true. Assertion is false, but Reason is true.

Assertion: A convex mirror has a positive focal length under the stated sign convention. Reason: Its principal focus lies behind the mirror, on the positive side of the origin. Assertion: A convex mirror has a positive focal length under the stated sign convention. Reason: Its principal focus lies behind the mirror, on the positive side of the origin.

1 Mark(s)

Both Assertion and Reason are true, and Reason is the correct explanation of Assertion.
Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
Assertion is true, but Reason is false. Assertion is true, but Reason is false.
Assertion is false, but Reason is true. Assertion is false, but Reason is true.

Assertion: Snell's-law constant depends on the colour and pair of media. Reason: Light travels fastest in vacuum. Assertion: Snell's-law constant depends on the colour and pair of media. Reason: Light travels fastest in vacuum.

1 Mark(s)

Both Assertion and Reason are true, and Reason is the correct explanation of Assertion.
Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
Assertion is true, but Reason is false. Assertion is true, but Reason is false.
Assertion is false, but Reason is true. Assertion is false, but Reason is true.

Assertion: A concave mirror forms a virtual, erect and enlarged image when the object is between P and F. Reason: In that position, the reflected rays diverge and their backward extensions meet behind the mirror. Assertion: A concave mirror forms a virtual, erect and enlarged image when the object is between P and F. Reason: In that position, the reflected rays diverge and their backward extensions meet behind the mirror.

1 Mark(s)

Both Assertion and Reason are true, and Reason is the correct explanation of Assertion.
Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
Assertion is true, but Reason is false. Assertion is true, but Reason is false.
Assertion is false, but Reason is true. Assertion is false, but Reason is true.

Assertion: The centre of curvature is represented by C. Reason: The centre of curvature is represented by P. Assertion: The centre of curvature is represented by C. Reason: The centre of curvature is represented by P.

1 Mark(s)

Both Assertion and Reason are true, and Reason is the correct explanation of Assertion.
Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
Assertion is true, but Reason is false. Assertion is true, but Reason is false.
Assertion is false, but Reason is true. Assertion is false, but Reason is true.

Assertion: A ray directed toward F of a convex mirror emerges parallel to the principal axis. Reason: The corresponding reflected-ray rule for a convex mirror is reciprocal to its parallel-ray rule. Assertion: A ray directed toward F of a convex mirror emerges parallel to the principal axis. Reason: The corresponding reflected-ray rule for a convex mirror is reciprocal to its parallel-ray rule.

1 Mark(s)

Both Assertion and Reason are true, and Reason is the correct explanation of Assertion.
Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
Assertion is true, but Reason is false. Assertion is true, but Reason is false.
Assertion is false, but Reason is true. Assertion is false, but Reason is true.

Assertion: A concave lens can form a real image on a screen for every object position. Reason: A concave lens always gives a virtual, erect and diminished image. Assertion: A concave lens can form a real image on a screen for every object position. Reason: A concave lens always gives a virtual, erect and diminished image.

1 Mark(s)

Both Assertion and Reason are true, and Reason is the correct explanation of Assertion.
Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
Assertion is true, but Reason is false. Assertion is true, but Reason is false.
Assertion is false, but Reason is true. Assertion is false, but Reason is true.

Assertion: An object at C in a concave mirror forms a diminished image. Reason: An object at C forms an image of the same size at C. Assertion: An object at C in a concave mirror forms a diminished image. Reason: An object at C forms an image of the same size at C.

1 Mark(s)

Both Assertion and Reason are true, and Reason is the correct explanation of Assertion.
Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
Assertion is true, but Reason is false. Assertion is true, but Reason is false.
Assertion is false, but Reason is true. Assertion is false, but Reason is true.

Assertion: A thin lens with small aperture has its two centres of curvature equidistant from O. Reason: The SI unit of lens power is dioptre. Assertion: A thin lens with small aperture has its two centres of curvature equidistant from O. Reason: The SI unit of lens power is dioptre.

1 Mark(s)

Both Assertion and Reason are true, and Reason is the correct explanation of Assertion.
Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
Assertion is true, but Reason is false. Assertion is true, but Reason is false.
Assertion is false, but Reason is true. Assertion is false, but Reason is true.

Assertion: A plane-mirror image is as far behind the mirror as the object is in front. Reason: For a plane mirror, the image and object have equal perpendicular distances from the mirror. Assertion: A plane-mirror image is as far behind the mirror as the object is in front. Reason: For a plane mirror, the image and object have equal perpendicular distances from the mirror.

1 Mark(s)

Both Assertion and Reason are true, and Reason is the correct explanation of Assertion.
Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
Assertion is true, but Reason is false. Assertion is true, but Reason is false.
Assertion is false, but Reason is true. Assertion is false, but Reason is true.

Assertion: Lens systems are used in microscopes. Reason: Canada balsam has refractive index 1.53. Assertion: Lens systems are used in microscopes. Reason: Canada balsam has refractive index 1.53.

1 Mark(s)

Both Assertion and Reason are true, and Reason is the correct explanation of Assertion.
Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
Assertion is true, but Reason is false. Assertion is true, but Reason is false.
Assertion is false, but Reason is true. Assertion is false, but Reason is true.

Assertion: A convex lens is called a converging lens. Reason: It converges parallel rays toward its principal focus. Assertion: A convex lens is called a converging lens. Reason: It converges parallel rays toward its principal focus.

1 Mark(s)

Both Assertion and Reason are true, and Reason is the correct explanation of Assertion.
Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
Assertion is true, but Reason is false. Assertion is true, but Reason is false.
Assertion is false, but Reason is true. Assertion is false, but Reason is true.

Assertion: The pole is the origin in the mirror sign convention. Reason: Light travels fastest in vacuum. Assertion: The pole is the origin in the mirror sign convention. Reason: Light travels fastest in vacuum.

1 Mark(s)

Both Assertion and Reason are true, and Reason is the correct explanation of Assertion.
Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
Assertion is true, but Reason is false. Assertion is true, but Reason is false.
Assertion is false, but Reason is true. Assertion is false, but Reason is true.

Assertion: The principal focus of a concave mirror lies on its principal axis. Reason: Rays parallel to the principal axis meet at the principal focus after reflection. Assertion: The principal focus of a concave mirror lies on its principal axis. Reason: Rays parallel to the principal axis meet at the principal focus after reflection.

1 Mark(s)

Both Assertion and Reason are true, and Reason is the correct explanation of Assertion.
Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
Assertion is true, but Reason is false. Assertion is true, but Reason is false.
Assertion is false, but Reason is true. Assertion is false, but Reason is true.

Assertion: A spherical mirror's radius of curvature equals PC. Reason: R is the radius of the sphere of which the reflecting surface is a part. Assertion: A spherical mirror's radius of curvature equals PC. Reason: R is the radius of the sphere of which the reflecting surface is a part.

1 Mark(s)

Both Assertion and Reason are true, and Reason is the correct explanation of Assertion.
Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
Assertion is true, but Reason is false. Assertion is true, but Reason is false.
Assertion is false, but Reason is true. Assertion is false, but Reason is true.

Assertion: A ray appearing to meet at the focus of a concave lens emerges parallel after refraction. Reason: This is the stated reciprocal ray rule for a concave lens. Assertion: A ray appearing to meet at the focus of a concave lens emerges parallel after refraction. Reason: This is the stated reciprocal ray rule for a concave lens.

1 Mark(s)

Both Assertion and Reason are true, and Reason is the correct explanation of Assertion.
Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
Assertion is true, but Reason is false. Assertion is true, but Reason is false.
Assertion is false, but Reason is true. Assertion is false, but Reason is true.

Assertion: Lens power is proportional to focal length. Reason: Lens power is the reciprocal of focal length. Assertion: Lens power is proportional to focal length. Reason: Lens power is the reciprocal of focal length.

1 Mark(s)

Both Assertion and Reason are true, and Reason is the correct explanation of Assertion.
Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
Assertion is true, but Reason is false. Assertion is true, but Reason is false.
Assertion is false, but Reason is true. Assertion is false, but Reason is true.

Assertion: A ray entering A rarer medium obliquely bends away from the normal. Reason: A ray entering A rarer medium obliquely bends toward the normal. Assertion: A ray entering A rarer medium obliquely bends away from the normal. Reason: A ray entering A rarer medium obliquely bends toward the normal.

1 Mark(s)

Both Assertion and Reason are true, and Reason is the correct explanation of Assertion.
Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
Assertion is true, but Reason is false. Assertion is true, but Reason is false.
Assertion is false, but Reason is true. Assertion is false, but Reason is true.

Assertion: An object is visible when reflected light from it reaches the eyes. Reason: An object reflects light that falls on it. Assertion: An object is visible when reflected light from it reaches the eyes. Reason: An object reflects light that falls on it.

1 Mark(s)

Both Assertion and Reason are true, and Reason is the correct explanation of Assertion.
Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
Assertion is true, but Reason is false. Assertion is true, but Reason is false.
Assertion is false, but Reason is true. Assertion is false, but Reason is true.

Assertion: A concave lens of shorter focal length has weaker divergence. Reason: A very short focal length concave lens causes higher divergence. Assertion: A concave lens of shorter focal length has weaker divergence. Reason: A very short focal length concave lens causes higher divergence.

1 Mark(s)

Both Assertion and Reason are true, and Reason is the correct explanation of Assertion.
Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion.
Assertion is true, but Reason is false. Assertion is true, but Reason is false.
Assertion is false, but Reason is true. Assertion is false, but Reason is true.

9. LIGHT REFLECTION AND REFRACTION-A&R-1 : Question 1 of 30