4.7

Question 1

Why does light refract (bend)?

Answer 1

Light refracts (bends) due to the difference in the speed of light between one medium and another.

Question 2

What happens when the speed of light speeds up or slows down after passing through a medium (object/material)?

Answer 2

If it speeds up, light waves bend away from the normal line, and if it slows down, light waves bend towards the normal line.

Question 3

How is the magnitude of refraction measured?

Answer 3

The magnitude of refraction is measured by a substances refractive index. The higher the RI, the more light bends.

Question 4

True or False: Refraction cannot result in optical illusions.

Answer 4

False: Refraction can result in optical illusions.

Question 5

What do convex lenses do?

Answer 5

Convex lenses converge light.

Question 6

What do concave lenses do?

Answer 6

Concave lenses diverge light.

Question 7

What is the focal length?

Answer 7

The focal length is the distance between the focus and the center of the lens.

Question 8

True or False: The focal length decreases as the width of the lens increases.

Answer 8

True: The focal length decreases as the width of the lens increases