formula for sound lesson
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frequency =wavelength *velocity
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Answer:
Formulas of sound :
(i) Echo
Speed of echo = ( 2 × distance between surface and source ) / time
(ii) V = f λ
where V = velocity of wave ,
f = frequency of sound wave ,
λ = wavelength .
(iii) f = 1 / t
where f = frequency of wave ,
t = time period .
(iv) E = h nu
where h = Plank's constant
E = energy of wave .
(v) f = √T/ 2 l ( π r² d )
f = frequency of stretched string
l = length
d = density
r = radius
T= time period .
Note that this formula is for stretched string only.
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