Waves at Boundaries Worksheet
3. Lower frequency – it will allow the wavelengths to be longer.
4. a) The medium for B is denser, so the boundary creates an inverted reflected wave.
Some of the wave is reflected, some is transmitted. Transmitted wave is slower than
incident wave. Ref. wave is same speed.
• B) inverted
• C) Reflected wave is same speed than incident wave. Trans wave is slower than
incident wave. Same frequencies, smaller amps for both.
• D) inverted
5. Firm second material: inverted reflected wave, both refl and trans are smaller
amp/energy, speed of ref. is same, speed of trans is slower
b) Less dense second material: erect ref. wave, speed of ref. is same, speed of trans
is faster, smaller amp/energy, same frequ.
6.
8.
b)
c)
•
Speed does not change if the same material
a) speed is less in second medium so the medium is denser
Less dense medium
Same medium
(Use table to complete what it would look like)