What is the name of a line drawn at 90° to the surface of a material?
Boundary
Incident
Normal
Which term is used to refer to an incoming ray?
Refracted
What is the law of reflection?
Angle of incidence = angle of reflection
Angle of incidence \(\textless\) angle of reflection
Angle of incidence \(\textgreater\) angle of reflection
Which term is used to refer to regular reflection from a smooth surface in a single direction?
Diffuse reflection
Specular reflection
Scattering
Which term is used to refer to the scattering of light by a rough surface?
Regular reflection
Which is densest - air, water or glass?
Air
Water
Glass
What happens to a light ray when it travels from water into air?
It bends towards the normal
It slows down
It bends away from the normal
Which word is used to describe a light ray being passed through a material?
Transmitted
Absorbed
Reflected
A light ray meets a plane mirror at 60°. What is the angle of reflection?
60°
30°
120°
A light ray passes from air into water at an angle of 30°. Which of these angles is likely to be the angle of refraction?
22°
38°