MEDIUM
Upper Secondary-IGCSE
IMPORTANT
Earn 100

The refractive index of a certain material is 1.45. State whether light travels faster or slower in the material than in the air.

Important Questions on Light

MEDIUM
Upper Secondary-IGCSE
IMPORTANT
Physics for Cambridge IGCSE workbook>Chapter 13 - Light>Exercise 13.2>Q 1
State what happens to the speed of light when light travels from air into glass.
MEDIUM
Upper Secondary-IGCSE
IMPORTANT
Physics for Cambridge IGCSE workbook>Chapter 13 - Light>Exercise 13.2>Q 2
State what happens to the speed of light when light travels from air into a vacuum.
MEDIUM
Upper Secondary-IGCSE
IMPORTANT
Physics for Cambridge IGCSE workbook>Chapter 13 - Light>Exercise 13.3>Q 2
A ray of light passes through the material with a refractive index 1.45. As it leaves that material, state whether it will bend towards or away from the normal.
MEDIUM
Upper Secondary-IGCSE
IMPORTANT
Physics for Cambridge IGCSE workbook>Chapter 13 - Light>Exercise 13.3>Q 4

Explain, using the figure, why a swimming pool does not look as deep as it actually is.

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EASY
Upper Secondary-IGCSE
IMPORTANT
Physics for Cambridge IGCSE workbook>Chapter 13 - Light>Exercise 13.4>Q 2

Explain why a ray in the figure does not bend at the point where it enters the prism, or where it leaves the prism?

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MEDIUM
Upper Secondary-IGCSE
IMPORTANT
Physics for Cambridge IGCSE workbook>Chapter 13 - Light>Exercise 13.4>Q 5

The figure shows light travelling down an optical fibre. Explain, using the diagram, why it is important that these fibres are not bent too much.

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EASY
Upper Secondary-IGCSE
IMPORTANT
Physics for Cambridge IGCSE workbook>Chapter 13 - Light>Exercise 13.5>Q 5

State which type of lens is used in eyeglasses to correct long sight ?

 

 

EASY
Upper Secondary-IGCSE
IMPORTANT
Physics for Cambridge IGCSE workbook>Chapter 13 - Light>Exercise 13.6>Q 4
Explain what monochromatic means.