Light And Optics - SS1 Physics Past Questions and Answers - page 1

1

Which of the following is NOT a portion of the electromagnetic spectrum?

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A

Radio waves

 

B

Sound waves

 

C

Gamma rays

 

D

Visible light

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2

Light is a form of energy that travels in:

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A

Particles

 

B

Waves

 

C

Both particles and waves

 

D

Neither particles nor waves

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3

The speed of light in a vacuum is approximately:

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A

300,000 meters per second

 

B

150,000 meters per second

 

C

30,000 meters per second

 

D

3,000 meters per second

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4

Which of the following colours of light has the shortest wavelength?

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A

Red

 

 

B

Yellow

 

C

Green

 

D

Violet

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5

When light passes from one medium to another and changes direction, it is called:

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A

Reflection

 

B

Refraction

 

C

Diffraction

 

D

Absorption

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6

The bending of light waves around obstacles or through small openings is known as:

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A

Reflection

 

B

Refraction

 

C

Diffraction

 

D

Absorption

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7

The phenomenon of light bouncing off a surface is called:

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A

Reflection

 

B

Refraction

 

C

Diffraction

 

D

Absorption

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8

The range of wavelengths of visible light is approximately:

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A

400 to 700 nanometres

 

B

500 to 900 millimetres

 

C

50 to 60 kilometres

 

D

56 to 125 metres

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9

The colour of an object that we see is determined by:

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A

The wavelength of the light it reflects

 

B

The temperature of the object

 

 

C

The intensity of the light it emits

 

D

The speed of the light it absorbs

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10

Which of the following phenomena is responsible for the formation of rainbows?

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A

Reflection

 

B

Refraction

 

C

Diffraction

 

D

Interference

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