REFRACTION of LIGHT

When light passes from a denser material into a less dense material...

• light slows down and bends toward the normal

• light slows down and bends away from the normal

• light speeds up and bends toward the normal

• light speeds up and bends away from the normal

Identify the correct definition of the critical angle.

• reflected: yes

  refracted: yes

• reflected: yes

  refracted: no

• reflected: no

  refracted: yes

• reflected: no

  refracted: no

The diagram shows light passing from air into glass. A number of angles have been labelled on the diagram.

Which of equations could be used to correctly calculate the refractive index, n, of the glass?

• 0.023

• 1.49

• 2.381

• 1.35

The diagram shows a ray of light being totally internally reflected at boundary between substances A and B.

• A

• B

• C

• D

The diagram shows a ray of light incident on the edge of a piece of glass. The angle i is bigger than the critical angle.

Which arrow correctly shows the direction of the ray after it leaves the edge of the glass?

• A

• B

• C

• D

Answer the question correctly.

• A

• B

• C

• D

Which diagram shows how a ray of light could pass through a glass block in air?

• 
• 
• 
•