Which of the following has curved reflecting surface?

(a)

plane mirrors

(b)

spherical mirrors

(c)

simple mirrors

(d)

None of the above

The distance from the pole to the focus is called

(a)

Pole length

(b)

focal length

(c)

principal axis

(d)

None of the above

Focal length is equal to half of the

(a)

centre of curvature

(b)

axis

(c)

radius of curvature

(d)

None of the above

If the focal length of a spherical mirror is 10 cm, what is the value of its radius of curvature?

(a)

10 cm

(b)

5 cm

(c)

20 cm

(d)

15 cm

The refractive index of water is

(a)

1.0

(b)

1.33

(c)

1.44

(d)

1.52

__________ form the perfect image of an object

(a)

Spherical mirrors

(b)

Parabolic mirrors

(c)

Plane mirrors

(d)

Cylindrical mirrors

Mirrors which magnify the object placed close to them.

(a)

Convex mirror

(b)

Concave mirror

(c)

Plane mirror

(d)

ellipsoid mirror

In which mirror the following statement is labeled?

(a)

Convex mirror

(b)

Concave mirror

(c)

Plane mirror

(d)

Spherical mirror

An imaginary line perpendicular to the reflecting surface is called

(a)

imaginary line

(b)

curved line

(c)

Perpendicular line

(d)

normal

When the angle of inclination decreases the number of images formed _________

(a)

increase

(b)

decreases

(c)

remain same

(d)

none of the above

The spherical mirror used in a beauty parlour as make-up mirror is ________.

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Concave mirror

Geometric centre of the spherical mirror is ________.

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Pole

Nature of the images formed by a convex mirror is _________.

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virtual image

_________ is a device which produces numerous pattern of images

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Kaleidoscope

__________ is the best reflector of light

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Silver

Convex mirror

(1)

Bouncing of light

Parobolic mirror

(2)

Bending of light

Regular reflection

(3)

Radio telescopes

Reflection

(4)

plane mirror

Refraction

(5)

Rear - view mirror