The critical angle and optical fibres

1

What is the law of reflection?

2

How do we describe the image in a plane mirror?

3

When does total internal reflection occur?

4

How do we calculate the critical angle?

5

Where do we use total internal reflection?

6

Which of these is untrue about ray diagrams?

7

What is the term that describes the changing direction of light when it changes medium?

8

Which statement explains why refraction occurs?

9

Which of these is an advantage of using optical fibres?

10

Where are optical fibres often used?