MEDIUM
Upper Secondary-IGCSE
IMPORTANT
Earn 100

State what happens to the speed of light when light travels from air into a vacuum.

Important Questions on Light

MEDIUM
Upper Secondary-IGCSE
IMPORTANT
Physics for Cambridge IGCSE workbook>Chapter 13 - Light>Exercise 13.3>Q 1
The refractive index of a certain material is 1.45. State whether light travels faster or slower in the material than in the air.
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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MEDIUM
Upper Secondary-IGCSE
IMPORTANT
Physics for Cambridge IGCSE workbook>Chapter 13 - Light>Exercise 13.3>Q 6
When light travels between two materials, refraction often occurs. State the property of the materials you would change to increase the effect.
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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EASY
Upper Secondary-IGCSE
IMPORTANT
Physics for Cambridge IGCSE workbook>Chapter 13 - Light>Exercise 13.4>Q 3
If a light left a swimming pool like this, how the real and apparent depth would compare.
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 ?