Light and Sound Wave Behavior

What is the definition of Refraction?

• The bending of waves as they enter a new medium

• When two interfering waves have a displacement in the opposite direction, crest and trough overlap. Zero amplitude.

• When two interfering waves have a displacement in the same direction, two crests and two troughs overlap. Increased amplitude.

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Refraction occurs when waves enter a new ​ (a)   and change ​ (b)   .

• medium

• speed

• obstacle

• air

• solid

• liquid

• gas

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What type of wave behavior is pictured above?

• Refraction

• Reflection

• Absorption

• Diffraction

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What is the definition reflection?

• The bending of waves as they enter a new medium

• Bouncing back of waves from a surface that it can’t pass through

• The bending of waves as they pass through openings or around corners

• When two interfering waves have a displacement in the same direction, two crests and two troughs overlap. Increased amplitude.

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NGSS.MS-PS4-2

What is the definition of Diffraction?

• The bending of waves as they enter a new medium

• Bouncing back of waves from a surface that it can’t pass through

• When two interfering waves have a displacement in the opposite direction, crest and trough overlap. Zero amplitude.

• The bending of waves as they pass through openings or around corners

Give an example of Diffraction.

• Water droplets act as prisms to separate white light into the ROYGBIV spectrum

• Decreased amplitude of the sound wave means softer sound

• the smaller the opening the more diffraction, light waves are so small you will have little diffraction.

• hearing the bass of the music through the openings in a car (longer wavelengths)

Which of the figures represents reflection?

• A

• B

• C

• D

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NGSS.MS-PS4-2

When a wave strikes an object and bounces off

• medium

• refraction

• reflection

• interference

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When a sound wave experiences reflection, we hear

• a louder sound

• an echo

• a quieter sound

• nothing

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Match the following

• light passing through the windows

• Transmission

• seeing your image in a mirror

• Refraction

• the reason the sky is blue

• Reflection

• hearing sound from the hallway

• Scattering

• seeing a rainbow after a rainshower

• Diffraction

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