Lesson 3: Wave Interactions

____ is the bouncing back of a ray of light, sound, or heat when the ray hits a surface that it does not go through.

• reflection
• refraction
• diffraction
• interference
• standing wave

True/ False Light waves reflecting off an object allow you to see that object.

• True
• False

True/ False A reflected sound wave is called an chaos.

• True
• False

A wave is transmitted through a substance when it ___________.

• passes through the substance.
• avoids the substance

______ is the bending of a wave as the wave passes between two substances in which the speed of the wave differs.

• refraction
• reflection
• diffraction
• interference
• standing wave

An example of refraction is a

• cloud
• rainbow
• snow

______ is a change in the direction of a wave when the wave finds an obstacle or an edge, such as an opening.

• diffraction
• reflection
• refraction
• interference
• standing wave

You can hear music around the corner of a building because sound waves have long wavelengths and are able to diffract around corners. However, you cannot see who is playing the music because the wavelengths of light waves ____________

• are much longer than sound waves,
• are much shorter than sound waves.

______ is the combination of two or more waves that results in a single wave.

• interference
• reflection
• refraction
• diffraction
• standing wave

Constructive interference happens when _____. The troughs of the waves also overlap.

• the crests of one wave seperate the crests of another wave or waves.
• the crests of one wave is not near the other waves.
• the crests of one wave overlap the crests of another wave or waves.