Question # 1

Light waves are

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Mechanical waves

Electromagnetic waves

Any of above

None of above

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

To observe interference of light, the condition, which must be met with is that the sources must be

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Monochromatic

Phase coherent

Both of above

None of above

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

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Wave pocket

Wavefront

Wave number

None of these

Light waves are

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Transverse waves

Longitudinal waves

Compressional

None of them wave

The appearance of colours in the soap (or oil) film results from

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Dispersion

Interference

Reflection

Refraction

Monochromatic light means wave of

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Same frequency

Same colour

Same Wavelength

All of them

Huygen principle is used to determine

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Speed of light

Location of wavefront

About polarized and unpolarized light

None of them

In case of destructive interference of two waves, the amplitude of the resultant wave will be __________ either of the waves.

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Greater than

Smaller than

Equal to

None of these

The appearance of colours in the soap (or oil) film results from

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Dispersion

Interference

Reflection

Refraction

Frequency of red colour as compared to that of violet colour is

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Equal

Smaller

Greater

None of these

Laws of reflection and refraction can also be explained by

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Particle nature of light

Quantum nature of light

Wave nature of light

Complex nature of light

In YDS experiment, fringe spacing means the distance between two consecutive _________ fringes

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Bright

Dark

Any of A or B

None of these

Angle between ray of light and the corresponding wavefront is

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0⁰

60⁰

90⁰

120⁰

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

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Neon lamp

Fluorescent tube

Sodium lamp

None of these

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