AEPHY Waves

Name the wave property indicated by the line between points D and H.

• Wavelength

• Frequency

• Amplitude

• Period

Points A and G are 3.6 cm apart. What is the wavelength of this wave?

• 2.40 x 10^-2 m

• 1.20 x 10^-2 m

• 5.40 x 10^-3 m

• 3.60 x 10^-3 m

It takes 0.09 s for point C to move to point F. Calculate the frequency of this wave.

• 0.09 Hz

• 1.20 Hz

• 0.833 Hz

• 0.456 Hz

Rank these sound waves by pitch.

• D > A > B > C

• A > C > B > D

• C > B > A > D

• A > D > B > C

Rank these sound waves by volume

• D > A > B > C

• A > C > B > D

• C > B > A > D

• A > D > B > C

Which statement about sound waves is true?

• In a compression, particle displacement is zero, pressure is at a maximum

• In a compression, particle displacement and pressure are both at a maximum

• In a rarefaction, particle displacement is zero, pressure is at a maximum

• In a rarefaction, particle displacement and pressure are both at a minimum

A light source has a measured intensity of 120 W m^-2 at a distance of 20 m. Calculate the intensity at 5 m from the source.

• 1920 W m^-2

• 1.92 x 10³ W m^-2

• 96 W m^-2

• 480 W m^-2

Which of the following statements is true?

• Wavefronts are always drawn one wavelength apart.

• Wavefronts show the distance between successive rays.

• Wavefronts are parallel to the direction of wave motion.

• Wavefronts are always drawn one second apart.

Which statement about the speed of sound waves is false?

• Sound waves always travel faster through materials with higher densities.

• Sound waves generally travel faster through solids compared to gases.

• The speed of sound is controlled by the density and elastic properties of a material.

• The speed of sound is several orders of magnitude slower than the speed of light

What is the Doppler Effect?

• A change in frequency due to the relative motion of a wave source and an observer

• When a wave overlaps and constructively interferes with another wave

• When a wave reflects back and interferes with itself

• When a wave bends due to traveling through a different medium