Reflection and Refraction

A student placed a pencil in a cup of water. The pencil appears broken because light

• always travels in a straight line.

• bends when it passes through water.

• makes the water in the glass evaporate.

• reflects the pencil on the water's surface.

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

• reflection 
• dispersion
• refraction
• total internal reflection

What is the difference between reflection and refraction? 

• Both involve light bending through a medium
• Reflection is light bouncing off a medium's surface and refraction is light bending through a medium
• Reflection is light bending through a medium's surface and refraction is light bouncing off a medium
• Refraction is light being absorbed in a medium and reflection is light being bent through a different medium

When light bounces back it is _____

• Reflected
• Refracted
• Absorbed
• Optical Density

Refraction is the bending of a wave disturbance as it passes from one _________ into another.

• glass
• medium
• area
• boundary

Why does the lower part of the child appear so much different in size from the upper part?

• The light rays that travel through water and then into air are refracted.
• The light rays that travel through water and then into air are enlarged.
• The light rays that travel through air and then into water are reflected.
• The light rays that travel through air and then into water are reduced.

In what medium does light travel the fastest?

• vacuum
• air
• water
• glass

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

The ray of light which leaves the mirror

• incident ray

• reflected ray

• x-ray

• UV ray

A mirror with a flat reflective surface is called

• convex mirror

• concave mirror

• plane mirror

• side mirror