Question # 1

An example of input device computer is:

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Keyboard

printer

monitor

RAM

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

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Its direction

Its speed

its frequency

Its wavelength

Optical fibers work on the principle of:

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Refraction

Reflection

Total internal reflection

Diffraction

After refraction from a convex lens, rays of light parallel to the principal axis converge at a point, this point of convex lens is called:

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Principal focus

Pole

Focal length

Optical center

Bouncing back of light after striking the surface is called:

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Refraction

Reflection

Diffraction

Interference

Hard disk is made of:

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Aluminium

Copper

Iron

Plastic

The data stored in C.D is:

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680 MB

650 MB

700 MB

750 MB

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

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

Spherical mirrors are used in:

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Medical

Search light

Microscope

All of these

Image formed on a camera is:

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real,invertred, and diminished

virtual, upright and diminshed

virtual, upright and magnified

real, inverted and magnified

The index of refraction depends on:

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The focal length

The speed of light

the image distance

The object distance

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