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

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

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

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 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

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

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Smaller

Longer

Equal

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 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

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

Speed of light in vacuum depends upon

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Frequency

Wavelength

Amplitude

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

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

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Dispersion

Interference

Reflection

Refraction

Light has

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Wave nature

Dual nature

Particle nature

None of them

Angle between ray of light and the corresponding wavefront is

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0⁰

60⁰

90⁰

120⁰

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