4.3 Wave Behaviours quiz Flashcards
(14 cards)
The bending of waves due to a change in speed is called…
Refraction
The bending of waves around the edge of a barrier is known as…
Diffraction
The interaction between two waves that meet is called…
Interference
What is it called when waves combine to make a wave with larger amplitude?
Constructive interference
When a wave hits a surface through which it cannot pass and bounces back, it is called…
Reflection
Waves combine to produce a smaller or zero-amplitude wave in a process called…
Destructive interference
When does refraction occus?
When a wave enters a new medium AT AN ANGLE
When a wave moves through an opening in a barrier, it…
Bends and spreads out
Which types of waves can experience interference?
All waves
Sound waves, light waves, and water waves can all exhibit interference.
Which of the following quantities do not change as a wave changes mediums?
a. Speed
b. Frequency
c. Speed and wavelength
d. Speed and period
e. Frequency and period
Frequency
What will occur when the two pulses interfere with each other?
The wave drops to zero when they meet, then both of the pulses will continue to travel on unaffected.
During constructive interference in sound, which of the following could be produced:
a. Louder sound
b. No sound
c. Quieter sound
d. Interference doesn’t occur in sound waves
A. Louder sound
Sketch the resultant wave form when the following two pulses meet:
Explain why you can hear someone around a corner even though you cannot see them.
Sound waves DIFFRACT around obstacles (light waves don’t)
Sound wavelengths are much longer so they diffract around corners. Light wavelengths are really small so any diffraction isn’t noticeable.
