Question # 1

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

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

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Smaller

Longer

Equal

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

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

Angle between ray of light and the corresponding wavefront is

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0⁰

60⁰

90⁰

120⁰

Wavelength of light, on the average, is given by

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10^-14m

10^-10m

10^-6m

10^-4m

Huygen's principle states that

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Light travels in straight line

Light has dual nature

Either of these

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 wave nature of light was proposed by

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Newton

Thomas Young

Huygen

None of these

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

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Dispersion

Interference

Reflection

Refraction

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

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Dispersion

Interference

Reflection

Refraction

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

Light waves are

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Transverse waves

Longitudinal waves

Compressional

None of them wave

Electromagnetic waves transport

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Energy only

Momentum only

Both A and B

None is correct

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

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Equal

Smaller

Greater

None of these

Light waves are

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Mechanical waves

Electromagnetic waves

Any of above

None of above

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ECAT Physics Chapter 10 Optical Instruments Online Test MCQs With Answers

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