Question # 1

Electromagnetic waves transport

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Energy only

Momentum only

Both A and B

None is correct

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

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

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Dispersion

Interference

Reflection

Refraction

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

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

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

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

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

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 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 terms phase difference and path difference are

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Same

Different

Equal

none of these

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

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Dispersion

Interference

Reflection

Refraction

The wave nature of light was proposed by

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Newton

Thomas Young

Huygen

None of these

In case of point source of light, shape of wavefront is

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Spherical

Cylindrical

Plane

None of above

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

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Equal

Smaller

Greater

None of these

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ECAT Physics Chapter 10 Optical Instruments Online Test MCQs With Answers

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