Question # 1

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

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

Electromagnetic waves transport

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Energy only

Momentum only

Both A and B

None is correct

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

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

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 case of point source of light, shape of wavefront is

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Spherical

Cylindrical

Plane

None of above

Angle between ray of light and the corresponding wavefront is

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0⁰

60⁰

90⁰

120⁰

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

Speed of light in vacuum depends upon

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Frequency

Wavelength

Amplitude

None of these

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

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

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

The wave nature of light was proposed by

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Newton

Thomas Young

Huygen

None of these

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

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

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Frequency

Amplitude

Wavelength

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

Light has

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Wave nature

Dual nature

Particle nature

None of them

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

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Dispersion

Interference

Reflection

Refraction

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

Light waves are

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Mechanical waves

Electromagnetic waves

Any of above

None of above

The terms phase difference and path difference are

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Same

Different

Equal

none of these

Light waves are

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Transverse waves

Longitudinal waves

Compressional

None of them wave

Huygen's principle states that

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Light travels in straight line

Light has dual nature

Either of these

None of these

Wavelength of light, on the average, is given by

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10^-14m

10^-10m

10^-6m

10^-4m

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

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

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Smaller

Longer

Equal

None of these

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