What is the law of reflection?

How do we describe the image in a plane mirror?

When does total internal reflection occur?

How do we calculate the critical angle?

Where do we use total internal reflection?

Which of these is untrue about ray diagrams?

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

Which of these is an advantage of using optical fibres?

Where are optical fibres often used?

Which statement explains why refraction occurs?