Wave Phenomena

how does diffraction work

• it goes through water and air

• is a beam of light stopping at a wall

• it bounces off of light

• is the bending of light as it passes around the edge of an object

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NGSS.MS-PS4-2

witch picture is diffraction

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NGSS.MS-PS4-2

NGSS.MS-PS4-1

A beam of light bends when it passes from air into water, and 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

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NGSS.MS-PS4-2

What type of stuff can be refracted?  Choose the best answer.

• Light
• sound
• heat
• anything that travels in waves

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Light refracts when:

• it Changes speed
• it changes from a particle to a wave
• its density changes
• it encounters a solid object

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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

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

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NGSS.MS-PS4-2

Refraction is the bending of a wave disturbance as it passes from one _________ into another.

• glass
• medium
• area
• boundary

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NGSS.MS-PS4-2

A material or substance that a matter wave travels through is  ________

• a block
• a wall
• a medium
• an electromagnetic spectrum

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What type of wave spreads out and goes through an opening or around corner?

• Reflection

• Refraction

• Interference

• Diffraction