For a sound wave in air incident on a layer of water at room temperature, what is the critical angle in degrees?
According to the Snell's law
where, v_1 is the velocity of the wave in the incident medium and
v_2 is the velocity of the wave in the refracted medium . Now from
the definition of critical angle, we require for
,
. And so,
Now for sound wave incident from air medium ( for sound wave air
medium is denser medium) to the interface of the air and water (
for sound, water is dilute medium ),
the velocity of sound in the air medium is
And the velocity of sound in the water medium is
And so, we have the value of the critical angle
Get Answers For Free
Most questions answered within 1 hours.