Light

Front

How are Electromagnetic waves different from Mechanical waves?

Back

EM waves can travel through the vacuum of space (without particles)

Front

We use the symbol c to

Back

represent the speed of light.

Front

The law of reflection states that

Back

the angle of reflection is equal to the angle of incidence

Front

What would you call this? Options: Reflection, Diffraction, Refraction, Friction

Back

Refraction

Front

The refractive index of a medium is the ratio of the speed of light in a vacuum to the speed of light in that medium.

Back

True

Front

Refraction occurs due to _____________

Back

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

Front

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

Back

diamond

Front

Why does a pencil appear broken when placed in a cup of water?

Back

Light travelling from water to air bends away from the normal making the pencil under water look closer to the surface.

Front

Calculate the refractive index of the mystery material.

Back

1.81

Front

If the refractive index of water is 1.33, at what angle will the light shone by the diver exit the water? Options: 14.6^∘, 49.7^∘, 28.6^∘, 55^∘

Back

49.7^∘