What is the name given to a ray of light directed at a plane mirror?
The incident ray
The normal
The reflected ray
A light ray meets a plane mirror at 60° to the normal. What is the angle of reflection?
30°
60°
120°
A light ray meets a plane mirror at 40° to the mirror. What is the angle of reflection?
40°
50°
80°
When a ray of light passes from air into water its speed changes and it may be bent. What is this process called?
Reflection
Refraction
Dispersion
A ray of light passes into a glass block and is bent. What is the name given to the ray inside the glass block?
The reference ray
The refracted ray
What happens to a light ray when it travels from glass into air?
It speeds up
It slows down
The speed remains unchanged
What happens to a light ray when it travels from air into water along the normal?
What happens to a light ray when it travels from water into air?
It bends towards the normal
It bends away from the normal
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°
A ray of light is incident along the normal to the surface of a tank of water. What is the angle of refraction?
0°
90°