Homework 20: Reflection, Refraction, Diffraction

A beam of light bends when it passes from air into water, and then bends even more when it passes from water into glass. What can you conclude from this fact?

• Air is denser than glass.

• Water is denser than glass.

• Glass is denser than water.

• Air is denser than water.

Tags

NGSS.MS-PS4-2

Light refracts when:

• It changes speed

• It changes from a particle to a wave

• Its density changes

• It encounters a solid object

Tags

NGSS.MS-PS4-2

Why does white light from the sun form a colorful rainbow when it passes through water droplets in the atmosphere?

• The droplets of water in the air have different densities

• Different-sized water droplets refract white light at different angles

• The colors that make up white light refract at different angles

• White light diffracts when it encounters water

What is the main difference between refraction and diffraction?

• Refraction is a phenomenon that affects light; diffraction is a phenomenon that affects sound.

• Refraction involves the bending of light; diffraction involves the bending and spreading of light, usually around an obstacle.

• Refraction usually happens in the atmosphere; diffraction usually happens closer to the earth's surface.

• Refraction involves changes to the density of light; diffraction involves changes to the speed of light.

Tags

NGSS.MS-PS4-2

NGSS.MS-PS4-1

Definition: The spreading out of waves as they pass through an opening or around objects.

• Reflection

• Refraction

• Diffraction

• Resonance

The diagram shows a series of wave fronts approaching an opening in a barrier. Point P is located on the opposite side of the barrier. The wave fronts reach point P as a result of

• resonance

• refraction

• reflection

• diffraction

Tags

NGSS.MS-PS4-2

Which wave phenomenon makes it possible for a player to hear sound from a referee's whistle in an open field even when standing behind the referee?

• diffraction

• Doppler effect

• reflection

• refraction

What would you call this?

• Reflection

• Diffraction

• Refraction

• Friction

Tags

NGSS.MS-PS4-2

NGSS.MS-PS4-1

Why does white light from the sun form a colorful rainbow when it passes through water droplets in the atmosphere?

• the droplets of water in the air have different densities
• The colors that make up white light refract at different angles

Tags

NGSS.MS-PS4-2

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.

Tags

NGSS.MS-PS4-2