Unit 7 - Waves

An electric guitar is generating a sound of constant frequency. An increase in which sound wave characteristic would result in an increase in loudness?

• speed

• period

• wavelength

• amplitude

A physics student notices that 4.0 waves arrive at the beach every 20. seconds. The frequency of these waves is

• 0.20 Hz

• 5.0 Hz

• 16 Hz

• 80 Hz

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NGSS.HS-PS4-1

In a demonstration, a vibrating tuning fork causes a nearby second tuning fork to begin to vibrate with the same frequency. Which wave phenomenon is illustrated by this demonstration?

• resonance

• interference

• nodes

• doppler effect

The diagram below shows two points, A and B, on a wave train.

How many wavelengths separate point A and point B?

• 1.0

• 1.5

• 3.0

• 0.75

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NGSS.HS-PS4-1

The diagram below shows wave fronts spreading into the region behind a barrier.

Which wave phenomenon is represented in the diagram?

• reflection

• refraction

• diffraction

• standing waves

The diagram below represents the wave pattern produced by two sources located at points A and B.

Which phenomenon occurs at the intersections of the circular wave fronts?

• diffraction

• interference

• reflection

• refraction

A monochromatic ray of light (f=5.09×1014 hertz) traveling in air is incident upon medium A at an angle of 45°. If the angle of refraction is 29°, medium A could be

• water

• fused quartz

• lucite

• flint glass

In a vacuum, light with a frequency of 5.0 × 10¹⁴ hertz has a wavelength of

• 6.0 × 10^–21 m

• 6.0 × 10^–7 m

• 1.7 × 10⁶ m

• 1.5 × 10²³ m

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NGSS.HS-PS4-1

A beam of monochromatic light travels through flint glass, crown glass, Lucite, and water. The speed of the light beam is slowest in

• flint glass

• crown glass

• lucite

• water

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NGSS.HS-PS4-1

The diagram below represents a periodic wave.

Which two points on the wave are in phase?

• A and C

• B and D

• A and D

• B and E

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NGSS.HS-PS4-1