Reflection and refraction

Why does the straw appear to be bent?

• light is reflected

• light is absorbed

• light is turned

• light is refracted

What do we call a material that light can travel through?

• air

• water

• medium

• pathway

What is a repeating disturbance or vibration that transfers or moves energy from place to place?  

• Medium
• Wave
• Compression
• Rarefaction

The illustration shows a light ray striking an object.
In the illustration, the light ray striking the object is-

• absorbed
• stopped
• reflected
• refracted

What is the angle of reflection equal to?

• The angle of refraction

• The angle of incidence

• The angle of absorption

• The angle of light

What might explain why light travels in a straight line?

• If there is nothing to interfere with light waves, they should travel in a straight line.

• Light waves will always travel in a straight line, even if they come into contact with another object.

• Light waves don't travel in a straight line.

• Light waves travel in a straight line because sound waves travel in a straight line.

What is the angle of incidence?

• The angle at which light bends in water.

• The angle at which light hits a surface.

• The angle at which light is absorbed by an object.

• The angle at which light bounces off a surface.

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.

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