Question # 1

A data storage device is:

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Printer

Hard disk

Monitor

CPU

The index of refraction depends on:

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The focal length

The speed of light

the image distance

The object distance

Optical fibre are:

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Cheap

Flexible

Lighter

All of these

Concave mirror formula is given by:

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R = 2r

sin<i/sin<r

1/f=1/p+1/q

1/f=1/p-1/q

Speed of light in air is ms^-1

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3 x 10⁸

3 x 10¹¹

3 x 10⁵

340

Angle opposite to the base of triangle of prism is called:

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angle of incidence

angle of refraction

angle of prism

emerging angle

The distance of image from mirror is represented by:

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q

p

F

m

The distance between principal focus and pole of mirror is called:

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Princpal focus

Focal length

P

Image

Totally reflecting prism is used in:

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periscope

binoculars

periscope and binocular

telescope

Optical fibers work on the principle of:

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Refraction

Reflection

Total internal reflection

Diffraction

Hard disk is made of:

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Aluminium

Copper

Iron

Plastic

Which of the following quantities is not change during refraction of light?

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Its direction

Its speed

its frequency

Its wavelength

The distance of spherical mirror is called:

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Curvature

Aperture

Sphere

a,b

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