Light-Unit 3, Module 2 TEST

A purple neon sign emits light waves with which of the following wavelengths?

• red and blue wavelengths
• purple wavelengths
• all wavelengths

On a calm day, you can see your reflection in a pond. On a windy day you cannot, because the surface is rough , resulting in a __________reflection.

• diffuse
• regular

An apple looks red because it absorbs red light.

• True
• False

Which statement about the image the person sees is FALSE?

• The person sees the image due to reflected rays.
• The image is the same size as the object.
• The image would appear the same in a convex mirror.
• The image is sharp because the mirror is smooth.

Light bends as it passes from air into glass at an angle due to _________.

• reflection
• refraction
• diffusion

A convex lens could also be called a _____ lens.

• concave
• converging

What is the name of the line drawn perpendicular to the surface where a light ray strikes?

• incident ray
• reflected ray
• normal

Blackout curtains are designed to keep light out of a space. These curtains are made using material that is:

• opaque
• transparent
• translucent

The cells in your eye that help you see in dim conditions are called _____ cells.

• cone
• rod

Frosted glass is an example of which type of material?

• opaque
• transparent
• transluscent