U6 (b) Wave Interaction Review

In each of these situations light refracts, except for one. Identify the case in which light is NOT refracted.

• a person wears glasses

  
  

• sunlight travels through space

  
  

• a magnifying glass enlarges an image

  
  

Houses with carpet are much quieter than houses with tile or hardwood floors because of sound wave

• absorption.

  
  

• diffraction.

  
  

• reflection.

  
  

• refraction.

  
  

The data shown in the table provides information about the density of four different materials. Predict through which substance would sound travel the fastest?

• Brass

• cork

• water

• iron

Use your knowledge of the properties of the different states of matter to determine in which state sound would travel the fastest.

• liquid carbon dioxide

  
  

• gaseous carbon dioxide

  
  

• 
  dry ice - solid carbon dioxide

  
  

Why does light refract when it encounters the glass in a lens?

• because it speeds up, which causes it to bend

  
  

• because it slows down, which causes it to bend

  
  

• because it hits a dense medium, which causes it to bounce off

  
  

The wave pictured represents a sound wave. Which label along the wave represents a sound with the LOWEST energy?

• A

• B

• C

• D

The term albedo (al-BEE-dough) is a measure of the amount of light reflected by a surface. The higher the albedo value of the surface of a material, the more light is reflected by it. The table gives the albedo values of the surfaces of different materials:

Based on the albedo values, which material MUST BE the darkest in color?

• Sand

• Brick

• White Roof

• Fresh asphalt

What do a prism, a magnifying glass, a microscope, and eyeglasses ALL have in common?

• They are opaque.

  
  

• They refract light.

  
  

• They reflect light.

  
  

• They are translucent.

  
  

If you put a pencil in a cup of water, it looks as if it is broken and larger in the water. This is because light waves

• can reflect off the surface.

  
  

• are absorbed instead of reflected.

  
  

• bend when passing from air to water.

  
  

To locate objects in their environments, bats in flight and porpoises under water both use ultrasound waves with frequencies that are beyond human hearing. These animals produce an ultrasonic wave and then detect echoes from nearby objects. If a porpoise and a bat both produce ultrasonic waves when they are are 16 meters from an object, which animal would hear its echo first and why?

• The porpoise would hear its echo first because the amplitude of sounds waves is greater in water than in air.

  
  

• The bat would hear its echo first because sound travels faster in air than in water.

  
  

• The porpoise would hear its echo first because sound travels faster in water then in air.