Refraction

The velocity of light in vacuum is _______ m/s

• 3x10⁸

• 3x10¹²

• 3x10⁶

• 3x10¹⁰

We can see objects because of_______

• reflection

• refraction

• transmission

• diffraction

How does light behave as it enters these mediums?

• continue its path as straight line.

• bends toward the normal

• bends away from the normal

• reflects

Absolute refractive index of any medium is always _______.

• less than 1

• greater than 1

• 1

• 0

Swimming pools and the ocean look shallower than they really are due to:

• reflection 

• dispersion

• refraction

• total internal reflection

The formula to calculate the refractive index is

• n=cv

• n=v/c

• n=c/v

• v=nc

What is this called?

• refraction

• reflection

• reconstroction

• retraction

According to the Law of reflection, a light ray striking a mirror

• continues moving through the mirror in the same direction

• moves into the mirror at a slightly different angle

• bounces off the mirror toward the direction it came from

• bounces off the mirror at the same angle it hits.

A ray of light traveling from air into crown glass strikes the surface at an angle of 30 degrees. What is the angle of refraction? (air n=1, crown glass n=1.532)

• 39.7 degrees

• 19.2 degrees

• 59.1 degrees

• 12.3 degrees

Glass has a _____________ index of refraction than air.

• Equal

• Greater

• Less

• Impossible to say