Question # 1

The index of refraction depends on:

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The focal length

The speed of light

the image distance

The object distance

Which is an example of a longitudinal wave:

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Sound wave

Light wave

Radio wave

Water wave

Which types of image is formed by a concave lens on a screen?

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Inverted and real

Inverted and virtual

upright and real

Upright and virtual

The centre of spherical mirror is called:

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Focus

Axis

Centre

Pole

Bouncing back of light after striking the surface is called:

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Refraction

Reflection

Diffraction

Interference

From which of the following we can get information almost about everything:

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Book

Teacher

Computer

Internet

Optical fibre are:

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Cheap

Flexible

Lighter

All of these

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

Snell's law is stated as:

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Sin i / sin r = n1/n2

sin i / sin r = n2/n1

sin r / sin i = n2/n1

sin r / sin i = 2n2/n1

Mathematical relationship between critical angle "C" and refractive index "n" is:

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N = C

N = 1 / sin c

N = 1 / cos c

N = 1 / sin2 c

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

An object of placed at he centre of curvature of a concave mirror. The image produced by the mirror is located:

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out beyond the centre of curvature.

at the centre of curvature

between the centre of curvature and the focal point

at the focal point

The refractive index of air is:

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6

7

2

1,0003

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