ET wave propagation and interactions

Which wave-boundary interaction takes place when the sidewalk heats up on a sunny day?

• reflection

• refraction

• diffraction

• absorption

Which wave-boundary interaction takes place when a magnifying glass enlarges an image?

• reflection

• refraction

• absorption

• diffraction

Which wave-boundary interaction takes place when waves curve around a boulder in the water?

• reflection

• refraction

• diffraction

• absorption

Which wave-boundary interaction takes place when a yell echoes off a building?

• reflection

• refraction

• diffraction

• absorption

A water wave moves from deep to shallow water. What happens to the wavelength as it crosses the boundary from deep to shallow water?

• it increases

• it decreases

• it remains unchanged

A water wave moves from deep to shallow water. What happens to the wave speed as it crosses the boundary from deep to shallow water?

• it increases

• it decreases

• it remains the same

A water wave moves from deep to shallow water. What happens to the frequency as it crosses the boundary from deep to shallow water?

• it increases

• it decreases

• it remains the same

Which wave property makes radio transmission possible?

• long wavelengths allow radio waves to diffract around obstacles

• long wavelengths allow radio waves to refract around obstacles

• high frequencies allow radio waves to diffract around obstacles

The crest of a wave is often described as a ______.

• resonance

• trough

• wavespeed

• wavefront

Which technology uses the refraction of waves as it moves through human tissues of differing densities to provide information about health?

• radar

• ultrasound

• x-rays

• radio transmissions