SJI 10-SCIENCE: Light Refraction

What is light refraction?

• The bending of light waves as they enter or cross the boundary between two media with the same density.

• The bending of light waves as they enter or cross the boundary between two media with different densities.

• The reflection of light waves off a surface.

• The scattering of light waves in different directions.

Who first observed the law of refraction?

• Albert Einstein

• Isaac Newton

• Willebrord Snell

• Galileo Galilei

According to the law of refraction, what happens to light when it passes into a medium with a higher index of refraction?

• The light bends away from the normal line.

• The light speeds up.

• The light bends toward the normal line.

• The light does not change direction.

What does the index of refraction measure?

• The speed of sound in a material.

• The amount of light absorbed by a material.

• The extent to which a substance slows down light waves passing through it.

• The amount of heat generated by a material.

The formula for calculating the index of refraction (n) is:

• n = v/c

• n = c/v

• n = v × c

• n = c + v

If the speed of light in a liquid is 2.25 x 10^8 m/s, what is the index of refraction of the liquid?

• 1.33

• 1.33 x 10^8

• 1.33 x 10^10

• 1.50

Snell's Law is represented mathematically as:

• sin i / sin r = constant

• sin r / sin i = constant

• tan i / tan r = constant

• cos i / cos r = constant

What happens to light rays as they travel from a denser medium to a less dense medium?

• They slow down and bend toward the normal.

• They speed up and bend away from the normal.

• They become absorbed.

• They stop moving.

A convex lens is also known as:

• Diverging lens

• Converging lens

• Biconcave lens

• Biconvex lens

Which of the following is NOT a use of a convex lens?

• Magnifying glasses

• Eyeglasses

• Microscopes

• Mirrors