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Wave Optics - SS1 Physics Past Questions and Answers - page 1

1

Interference of light waves occurs when:

A

Light waves pass through a medium

 

B

Light waves reflect off a surface

 

C

Light waves superpose and overlap

 

D

Light waves scatter in all directions

 

correct option: c
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2

In constructive interference of light waves:

A

The waves cancel each other out

 

B

The waves reinforce each other

 

C

The waves change direction

 

D

The waves scatter in random directions

correct option: b
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3

In destructive interference of light waves:

A

The waves cancel each other out

 

B

The waves reinforce each other

 

C

The waves change direction

 

D

The waves scatter in random directions

correct option: a
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4

Interference of light waves can result in the formation of:

A

Shadows

B

Reflection

 

C

Diffraction

 

D

Interference patterns

correct option: d
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5

The phenomenon of interference is a result of:

A

Reflection of light waves

 

B

Refraction of light waves

 

C

Superposition of light waves

 

D

Scattering of light waves

correct option: c
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6

Interference of light waves is a characteristic property of:

A

Transverse waves

 

B

Longitudinal waves

 

C

Electromagnetic waves

 

D

Mechanical waves

correct option: c
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7

The colours observed in thin film interference are due to:

A

Absorption of light

 

B

Reflection of light

 

C

Refraction of light

 

 

D

Dispersion of light

correct option: b
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8

The phenomenon of interference is commonly observed in:

A

Sound waves

 

B

Water waves

 

C

Light waves

 

D

All of the above

correct option: d
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9

Interference fringes are formed when light waves:

A

Interact with a single slit

 

 

B

Interact with a double slit

 

C

Pass through a convex lens

 

D

Pass through a polarizer

correct option: b
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10

Explain the phenomenon of interference of light waves. How does it occur and what are its characteristics?

Interference of light waves is the superposition of two or more light waves, resulting in the formation of regions of constructive and destructive interference. It occurs when light waves from different sources or from the same source with different paths interfere with each other. Interference is a result of the wave nature of light, where the crests and troughs of the waves either reinforce or cancel each other out.

The characteristics of interference include the formation of interference patterns, where bright and dark regions are observed. Constructive interference occurs when the crests of two waves coincide, resulting in the reinforcement of the waves and the formation of bright regions. Destructive interference occurs when the crest of one wave coincides with the trough of another wave, resulting in the cancellation of the waves and the formation of dark regions.

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