(Savvas 17.3) Ch 17.3 Behavior of Waves

What happens when a wave reflects off a fixed boundary?

• The reflected wave will be turned upside down.

• The amplitude will double as it strikes the surface.

• The speed of the wave will decrease.

• The frequency of the wave will decrease.

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Refraction occurs when a wave enters a new medium at an angle because

• the wave changes speed in the new medium.

• the wave's frequency changes.

• the wave's amplitude increases.

• the wave is absorbed by the new medium.

A wave diffracts more if its wavelength is small compared to the size of an opening or obstacle.

• True

• False

Answer explanation

A wave diffracts more if its wavelength is large compared to the size of an opening or obstacle.

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At certain wavelengths, interference between a wave and its reflection can produce a(n) ______.

• standing wave.

• traveling wave.

• diffraction pattern.

• amplitude modulation.

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If a standing wave occurs in a medium at a given wavelength, another standing wave will occur if this wavelength is doubled.

• True

• False

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Which one of these is an example of a common standing wave?

• The vibrations you can see when plucking a stringed instrument.

• The sound of a car engine running smoothly.

• The light from a flashlight.

• The flow of water in a river.

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Match the examples to the behavior of the waves.

• interference

• Light bending as it passes through a microscope.
• refraction

• Noise cancelling headphones

• reflection

• Water waves bending around a rock

• diffraction

• An echo heard in a canyon

This diagram represents a series of waves that curve as they pass through a small space. Which wave behavior is represented in this diagram?

• reflection

• refraction

• diffraction

• interference

The red arrow in this diagram represents a light ray as it passes from one medium to another medium.

Which wave behavior is represented in this diagram?

• reflection

• refraction

• diffraction

• interference

This diagram represents the combination of more than one wave. Which wave behavior is represented in this diagram?

• reflection

• refraction

• diffraction

• interference