light

What particles make up light?

• Photons
• Neutrons
• Protons

Light behaves like both a particle and a ______.

• Mass
• Wave
• Current

A student placed a pencil in a cup of water. The pencil appears broken because light-

• light travelling from water to air bends away from the normal making the pencil under water look closer to the surface

• light travelling from water to air bends towards the normal making the pencil under water look further away

• light travelling from air to water bends towards the normal making the pencil under water look higher up

• light travelling from air to water bends away from the normal making the pencil under water look closer to the surface

Refraction occurs due to _____________

• the change in the wave's speed when it enters a new medium

• the wave bouncing off a boundary

• the change in the wave's frequency when it enters a new medium

• the wave bending around a barrier

Light has the lowest velocity in which medium?

flint glass n=1.70

air n=1.0001

water n=1.33

diamond n=2.45

• diamond

• water

• flint glass

• air

Calculate the refractive index of the mystery material.

• 0.55

• 1.5

• 1.81

• 2.05

If the refractive index of water is 1.33, at what angle will the light shone by the diver exit the water.

• 14.6^∘

• 49.7^∘

• 28.6^∘

• 55^∘