Light

Light traveling through the air moves in a straight line. An object viewed through water looks different because light rays that travel through water are –

• bent
• bounced
• reflected
• absorbed

Which of the following best models how light is reflected?

• An arrow hitting a target
• A ball bouncing off a wall
• An apple falling from a tree
• A marble rolling down a ramp

The diagram shows a periscope used to see objects that are behind or under a barrier.
What makes it possible to see an object when looking through a periscope? The periscope –

• contains mirrors that reflect the object
• magnifies small objects so they can be seen
• absorbs the light rays passing through it
• separates the light into different colors

Students often use a hand lens to make small objects appear larger. 
A hand lens makes objects appear larger because the lens —

• increases the light’s strength
• changes the color of the light
• bends light passing through it
• converts light energy to heat

Scientists use telescopes to make distant objects appear closer. Some parts of atelescope are shown below.
Which of the following best describes how the objective lens of this telescope helps ascientist observe the moon?

• The objective lens produces light.
• The objective lens blocks light.
• The objective lens reflects light.
• The objective lens refracts light.

A student sees a mirror image of a tree in a pond on a very still day.
The student is able to see a mirror image of the tree in the pond because light striking the surface of the water –

• 
  is absorbed.
• bends downward.
• becomes brighter.
• 
  bounces off.

Some students paint the inside of several boxes. They paint each box a different color. They observe that the inside of the box painted white looks brighter than the others. What is the most likely reason this box looks brighter?

• 
  More light is reflected off white paint.
• More light is refracted by white paint.
• More light passes through white paint.
• 
  More light is absorbed by white paint.

The model shows a special glass fiber that is thinner than some metal wires. When light enters one end of the fiber, it moves through the fiber as shown. After the light leaves the fiber, it travels 

• in a straight line
• back into the fiber
• around the fiber
• in a curve

In the illustration below, a light bulb is shining above a bowl of water. The arrows show four possible behaviors of light rays. Which one shows the behavior of light that is being reflected?

• W
• X
• Y
• Z

When light travels through air into a prism, it bends and separates into many colors.
In which other situation does light bend? 

• When light moves through air into water
• When light hits a wall
• 
  When light passes through outer space
• When light hits a mirror