Big Idea 10

Light travels in the form of waves. The diagram below shows the path of a light wave moving from medium A to medium B. Which of the following occurs when the light wave enters medium B?

• The light wave stops moving.

• The light wave's speed changes.

• The light wave does not change.

• The light wave changes to a sound wave.

Tags

NGSS.MS-PS4-2

Farsighted people wear eyeglasses that contain convex lenses. The diagram shows light passing through a convex lens. Which of these processes is represented in the diagram?

• absorption

• reflection

• refraction

• transformation

Tags

NGSS.MS-PS4-2

When NASA scientists communicate with the mars rover, shown in the illustration, they use electromagnetic radiation with a long wavelength and low energy. Which type of radiation do they most likely use?

• X-rays

• visible light

• radio waves

• infrared waves

The illustration shows what happens when light is passed through a prism. What type of light passed through the prism?

• white light

• yellow light

• infrared light

• ultraviolet light

Tags

NGSS.MS-PS4-1

NGSS.MS-PS4-2

Kareem told his friend about the beautiful rainbow he saw just after a rainstorm. Kareem then explained to his friend how a rainbow forms. What was Kareem’s explanation?

• The light waves were refracted by moisture in the air and separated into colors.

• Tiny droplets of water reflected the light waves that struck them.

• Light traveled faster after the rainstorm because of the moisture in the air.

• The intensity of light increased as the waves passed through tiny droplets of water.

Tags

NGSS.MS-PS4-2

The image shows light entering water. Which statement explains why light bends when it reaches the surface of the water?

• Light bends because water changes the amount of energy it carries.

• Light bends because water absorbs some of the light that reaches it.

• Light bends because the water reflects some of the light that reaches it.

• Light bends because water changes its speed when it moves from air into water.

Tags

NGSS.MS-PS4-2

The drawing illustrates a wave in motion. What is the name given to the substance through which a wave travels?

• a crest

• a frequency

• a medium

• a state

Tags

NGSS.MS-PS4-2

Sound waves can move at different speeds. What can affect the speed at which sound waves travel?

• the amplitude of sound waves

• the material through which sound waves travel

• the distance over which sound waves travel

• the frequency of sound waves

Tags

NGSS.MS-PS4-2

Look closely at the graph of the speed of sound waves in air and water. What can you conclude from the data on this graph?

• The speed of sound waves is constant.

• Sound waves travel faster than light waves.

• Both air and water transmit sound waves at the same speed.

• The speed of sound waves depends on the medium through which they travel.

Based on what Mia learned, which of the following types of electromagnetic radiation has the longest wavelength?

• red light

• violet light

• radio waves

• infrared light