PHY113-2 (Refraction)

Light travels through a vacuum at a speed

When light travels from a material with one index of refraction to a material with a different index of refraction, the angle of incidence is related to the angle of refraction by

Light travels through materials at a speed more than its speed in a vacuum.

• True

• False

Answer explanation

Light travels through materials at a speed less than its speed

in a vacuum.

The index of refraction of a material is

It is a formula used to describe the relationship between the angles of incidence and refraction

• Snell's Law
• Optical Theorem
• Fermat's Principle
• Law of Reflection

When light passes from a medium of smaller refractive index into one of larger refractive index, the refracted ray bends away from the normal.

• True

• False

Answer explanation

When light passes from a medium of larger refractive index into one of smaller refractive index, the refracted ray bends away from the normal.

Critical angle equation

Brewster's law equation

The net effect of a prism is to change the direction of a light ray.

• True

• False

Light rays corresponding to different colors bend by different amounts.

• True

• False