Question # 1

Spherical mirrors are used in:

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Medical

Search light

Microscope

All of these

Magnification of mirror is given by:

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m=p/q

m=q/p

m=pxq

m=1/p+q

To see stomach problems we use:

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Gastroscope

Bronchoscope

Cystoscope

All of these

The distance of spherical mirror is called:

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Curvature

Aperture

Sphere

a,b

The refractive index of air is:

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6

7

2

1,0003

The minimum value of angle of deviation is called:

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Minimum angle

incident angle

angle of minimum deviation

None of these

The index of refraction depends on:

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The focal length

The speed of light

the image distance

The object distance

Totally reflecting prism is used in:

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periscope

binoculars

periscope and binocular

telescope

Optical fibre are:

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Cheap

Flexible

Lighter

All of these

The loudness of a sound is most closely related to its:

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Frequency

Period

Wavelength

Amplitude

If a ray of light is glass is incident on an air surface at an angle greater than the critical angle, the ray will.

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refract only

reflect only

partially refract and partially reflect

Diffract only

Astronauts in space need to communicate with each other by radio links because:

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Sound waves travel very slowly in space

Sound waves travel very fast in space

Sound waves cannot travel in space

Sound waves have low frequency in space

The distance of image from mirror is represented by:

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q

p

F

m

____________ is always virtual in case of convex mirror.

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p

image

object

all of these

Totally reflecting prism turns the incident ray at an angle of:

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90^o

60^o

75^o

45^o

Which of the following is not processing:

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Arranging

Manipulating

Calculating

Gathering

The line which passes through pole of the mirror and center of curvature is called principal:

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axis

Focus

Line

None of these

When a ray of light enters from denser medium to rare medium, the angle of incidence for which angle of refraction is 90^o is called:

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angle of incidence

critical angle

angle of refrection

None of these

An object is 14 cm is front of a convex mirror. The image is 5.8 cm behind the mirror. What is the focal length of the mirror?

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4.1 cm

8.2 cm

9.9 cm

20 cm

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