Reflection and Refraction

Glass has a _____________ index of refraction than air.

• Equal
• Greater
• Less
• Impossible to say

What is the angle of reflection (θ_r) in the image?

• 56^o

• 90^o

• 124^o

• 34^o

A beam of light bends when it passes from air into water, and more when it passes from water into glass. What can you conclude from this fact?

• Air is denser than glass

• Water is denser than glass

• Glass is denser than water

• Air is denser than water

A light ray is incident from water to air. Which of the refracted rays is correct?

• A

• B

• C

• D

The line 90 degress through the refracting or reflecting surface is called?

• Medium

• Normal

• Incidence

• Reflection

A student does the experiment on tracing the path of a ray of light passing through a rectangular glass slab for different angles of incidence. He can get a correct measure of the angle of incidence and the angle of emergence by following the labelling indicated in figure:

• I

• II

• III

• IV

The speed of light in vacuum is

A higher index of refraction means that the wave travels _____________ the speed of light in a vacuum in that medium.

• Faster than

• Slower than

• Equal to

• Answer is not here

There are certain angles of incidence for which the angle of refraction is close to 90°. What is this angle called?

• Total internal angle

• Critical angle

• Reflection angle

• Refracted angle

The law of reflection states that

• Angle of incidence = Angle of reflection

• Angle of incidence = Angle of incidence

• Angle of reflection = Angle of translucence

• Angle of reflection = Angle of reflection