Boundary Behavior of a Wave

Refraction occurs when waves enter a new ​ (a)   and change ​ (b)   .

• medium

• speed

• obstacle

• air

• solid

• liquid

• gas

Tags

NGSS.HS-PS4-5

What is the definition of Diffraction?

• The bending of waves as they enter a new medium

• Bouncing back of waves from a surface that it can’t pass through

• When two interfering waves have a displacement in the opposite direction, crest and trough overlap. Zero amplitude.

• The bending of waves as they pass through openings or around corners

When a sound wave experiences reflection, we hear

• a louder sound

• an echo

• a quieter sound

• nothing

Tags

NGSS.MS-PS4-2

Match the following

• hearing sound from the hallway

• Reflection

• seeing a rainbow after a rainshower

• Scattering

• the reason the sky is blue

• Diffraction

• light passing through the windows

• Transmission

• seeing your image in a mirror

• Refraction

Tags

NGSS.MS-PS4-2

What is the definition reflection?

• The bending of waves as they enter a new medium

• Bouncing back of waves from a surface that it can’t pass through

• The bending of waves as they pass through openings or around corners

• When two interfering waves have a displacement in the same direction, two crests and two troughs overlap. Increased amplitude.

Tags

NGSS.MS-PS4-2

· Why can we hear around a corner but not see?

• Increased amplitude of the light wave means brighter light

• the smaller the opening the more diffraction, light waves are so small you will have little diffraction.

• Decreased amplitude of the light wave means dimmer light

What is the picture an example of?

• Reflection

• Refraction

• Diffraction

• Transmission

What happens to a wave when it hits a boundary at an angle?

• It reflects back at the same angle

• It refracts and changes direction

• It stops completely

• It speeds up

Which of the following best describes the phenomenon of wave reflection?

• Waves bending around an obstacle

• Waves bouncing back from a surface

• Waves changing speed in a new medium

• Waves spreading out after passing through a gap

Tags

NGSS.MS-PS4-2

When a wave passes from one medium to another, which property is most likely to change?

• Frequency

• Wavelength

• Amplitude

• Speed

Tags

NGSS.HS-PS4-1