Question # 1

Angle between the ray of light and the corresponding wavefront is:

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0°

60°

90°

120°

Electromagnetic waves transport:

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Energy only

Momentum only

Both A and B are correct

None of is correct

Which one of the following can act approximately as a source of monochromatic light;

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Neon lamp

Fluorescent tube

Sodium lamp

None of these

The speed of the secondary wavelets as mentioned in Huygen's principle is _____ the speed of propagation of the wave itself.

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Equal to

Greater than

Smaller than

None of these

The ratio of the size of the image to that of object is called:

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Focal length

Aperture

Linear magnification

Principal axis

Wave length of that color as compared to that of violet color is:

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Smaller

Longer

Equal

None of these

The size of the image is maximum when its distance from the magnifying glass is:

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0.10 m

0.15 m

0.20 m

0.25 m

The focal length of convex lens having magnifying power of 5.55 is:

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5.5 cm

5 cm

4.5 cm

6 cm

If the focal length of the convex lens is 5 cm, then to get the real and inverted image of the same size as that of object, the object should be placed at:

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5 cm

10 cm

15 cm

20 cm

In case of constructive interference of two waves, the amplitude of the resultant wave is _______ either of the waves:

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Greater than

Equal to

Smaller than

None of these

Speed of light in vacuum depends upon:

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Frequency

Wavelength

Amplitude

None of these

If the object is situated at focus of a convex lens, then its image is formed at:

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F

2F

Infinity

None of these

The wave nature of light was proposed by:

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Newton

Thomas Young

Huygen

None of these

The magnifier forms a virtual image of the object at:

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Least distance of distinct vision

Much farther than the least distance

Both A and B are correct

None of these

The locus of all the points in the same phase of vibration is called:

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Wave packet

Wave front

Wave number

None of them

Which one the following gives three regions of electromagnetic spectrum in order of increasing wavelength?

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Gamma rays, micro waves, visible light

Radio waves, ultraviolet waves, X-rays

Ultraviolet rays, infrared rays, micro waves

Visible light, gamma rays, radio waves

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