2007-06-14 12:17:16 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Physics
Boundary behaviour is when a wave reaches the end of a medium trough which it is travelling, IE: it reflects (or bounces if you prefer).
That's how you can see yourself in a mirror, that's how you can hear echoes.
Refraction of a wave is accompanied by a change in speed and wavelength of the waves as it passes trough a medium. That's how you can see a rainbow, light goes trough raindrops.
Surface waves like waves on a body of water are caused by many things: wind, boats, swimmers, pebbles dropped.
2007-06-18 06:35:36 · answer #1 · answered by Yahoo! 5 · 0⤊ 0⤋
a million. you tremendously much threw the e book at the same time as examining Order of the Phoenix through fact of Umbridge's strikes fake 2. various the failings Draco stated approximately Harry have been real real 3. Harry may be somebody you may get alongside with fake ( I basically don't have the endurance for that. =/ ) 4. without Luna, the books does no longer be a similar real 5. Hermione aggravated you in specific situations real 6. You felt undesirable for Bellatrix fake 7. You cheered while Voldemort died real 8. Ron Weasley is super! real
2016-12-08 09:29:32 · answer #2 · answered by newcomer 4 · 0⤊ 0⤋
The ref. is an excellent demonstrator.
2007-06-16 04:20:31 · answer #3 · answered by kirchwey 7 · 0⤊ 0⤋