Question # 1

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

Electromagnetic waves transport

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Energy only

Momentum only

Both A and B

None is correct

In an interference pattern of Young's Double Slit (YDS) experiment

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Bright fringes are wider than dark fringes

Dark fringes are wider than bright fringes

Both dark and bright fringes are of equal width

Central fringes are wider than the outer fringes

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

The terms phase difference and path difference are

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Same

Different

Equal

none of these

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

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Smaller

Longer

Equal

None of these

Light waves are

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Transverse waves

Longitudinal waves

Compressional

None of them wave

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

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 light, on the average, is given by

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10^-14m

10^-10m

10^-6m

10^-4m

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

Huygen's principle states that

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Light travels in straight line

Light has dual nature

Either of these

None of these

The property of light which does not change with the nature of the medium is

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Frequency

Amplitude

Wavelength

None of these

The wave nature of light was proposed by

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Newton

Thomas Young

Huygen

None of these

Two sources are said to be coherent if they have

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Same amplitude

Same wavelength

Definite phase relation with each other

None of them

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Physics ECAT Pre Engineering Chapter 10 Optical Instruments Online Test MCQs With Answers

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