the angle between incident ray and reflected ray is 70°. What is the angle of incidence ? the angle between incident ray and reflected ray is 70°. What is the angle of incidence ?

1 Mark(s)

45° 45°

30° 30°

55°55°

35° 35°

the method of conjugate foci can be used to determine the focal length the method of conjugate foci can be used to determine the focal length

1 Mark(s)

both concave & convex mirror

only the concave mirror

only the covex mirror

all of these

in an experiment with a concave mirror, the object is placed at a distance x from the focus and the image is formed at a distance y from the focus. The focal length of the mirror will be : in an experiment with a concave mirror, the object is placed at a distance x from the focus and the image is formed at a distance y from the focus. The focal length of the mirror will be :

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xy xy

√xy√xy

√x/y √x/y

x+y/2x+y/2

an object is placed at a distance of 40 cm from a concave mirror of focal length 15 cm . If the object is displaced through a distance of 20 cm towards the mirror, the displacement of the image will be : an object is placed at a distance of 40 cm from a concave mirror of focal length 15 cm . If the object is displaced through a distance of 20 cm towards the mirror, the displacement of the image will be :

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30 cm towards the mirror30 cm towards the mirror

36 cm away from the mirrror36 cm away from the mirrror

30 cm away from the mirror30 cm away from the mirror

36 cm towards the mirror36 cm towards the mirror

two plane mirror are inclined at an angle of 60° . The total number of images formed by the two mirrors is two plane mirror are inclined at an angle of 60° . The total number of images formed by the two mirrors is

1 Mark(s)

44

55

66

77

A plane mirror produces a magnification of A plane mirror produces a magnification of

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-1-1

11

00

between 0 & infinity between 0 & infinity

How many images will be formed if two mirrors are fitted on the adjacent walls and one mirror on the ceiling ? How many images will be formed if two mirrors are fitted on the adjacent walls and one mirror on the ceiling ?

1 Mark(s)

22

33

1111

77

when a mirror is rotated through an anlge 10°, the reflected ray from it turns through an angle of when a mirror is rotated through an anlge 10°, the reflected ray from it turns through an angle of

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10°10°

20°20°

30° 30°

40°40°

the radius of cuvature of plane mirror is : the radius of cuvature of plane mirror is :

1 Mark(s)

zerozero

infiniteinfinite

definitedefinite

dependent on the size of the mirror dependent on the size of the mirror

Where should an object be placed in front of a concave mirror of focal length f so that the image to be of the same size as the object ? Where should an object be placed in front of a concave mirror of focal length f so that the image to be of the same size as the object ?

1 Mark(s)

R/2R/2

R/3R/3

R/4R/4

RR

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