Question # 1

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

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

Huygen principle is used to determine

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Speed of light

Location of wavefront

About polarized and unpolarized light

None of them

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

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Smaller

Longer

Equal

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

Light has

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Wave nature

Dual nature

Particle nature

None of them

Monochromatic light means wave of

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Same frequency

Same colour

Same Wavelength

All of them

A line which represents the direction of travel of a wave is known as

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Spherical wavefront

Locus

Ray

Either B or C

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

The terms phase difference and path difference are

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Same

Different

Equal

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 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

When the source of light is at very large distance, the shape of wavefront is

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Spherical

Cylindrical

Plane

None of these

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

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ECAT Physics Chapter 10 Optical Instruments Online Test MCQs With Answers

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