php require("/home/jeffery/public_html/astro/waves/doppler_effect_videos.html");?>
Doppler effect videos
(i.e.,
Doppler effect
videos
):
Fire Engine siren demonstrates the Doppler Effect | 0:18
: Good and has sound. Short enough for
classroom
.
The Doppler Effect: what does motion do to waves? | 3:02
: OK
animation
, but deplorably it conflates
Doppler effect
and the
cosmological redshift
which are different, though related, effects in the opinion of
yours truly
. Too long for the
classroom
.
SONIC BOOMS & JETS | Best Compilation | 3:26
: No chit and chat, just
sonic booms
. Just show first 60 seconds or so.
How to Crack a Whip | 2:21
: When a
whip
is
cracked
, a
wave packet
accelerates down the
whip
and breaches the
sound speed
(340 m/s at
sea level
at 15° C:
Wikipedia: Speed of Sound: Tables
) and creates a small
sonic boom
(see
Wikipedia: Whip: Cracking
;
Wikipedia: Whipcracking
).
Whips
were the first human
human artifact
to breach the
sound barrier
(see
Wikipedia: Whip: Cracking
).
Local file:
local link: doppler_effect_videos.html
.
File:
Waves file
:
doppler_effect_videos.html
.