Question # 1

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

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Its direction

Its speed

its frequency

Its wavelength

Magnification of mirror is given by:

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m=p/q

m=q/p

m=pxq

m=1/p+q

The principal focus of a concave mirror is:

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Virtual

Real

Imaginary

Dual aspect

Snell' law is:

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n = sin<x/sin <r

n=sin <i/sin<r

n = sin <r/sin<i

<i/<r

A data storage device is:

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Printer

Hard disk

Monitor

CPU

The data stored in C.D is:

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680 MB

650 MB

700 MB

750 MB

A converging mirror with a radius of 20 cm creates a real image 30 cm from the mirror. What is the object distance?

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5.0 cm

7.5 cm

15 cm

20 cm

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 loudness of a sound is most closely related to its:

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Frequency

Period

Wavelength

Amplitude

When the object is placed beyond 2F of a convex lens, the image formed will be:

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Real, inverted and smaller than the object

Real, inverted and of the same size as the object

Real, inverted and larger in size than the object

Virtual, erect and larger in size than the object

Power of convex lens is 10 D. Its focal length is:

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100 m

10 m

1 m

0.1 m

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

Bouncing back of light after striking the surface is called:

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Refraction

Reflection

Diffraction

Interference

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