When sound travels from air to water the quantity that remains unchanged is :

Options

A. speed
B. frequency
C. intensity
D. wavelength

Answer

C

Explanation

`L_(A) = "log"_(10) (I_(A))/(I_(0)) rArr (I_(A))/(I_(0)) = 10^(LA)`
or `I_(A) = I_(0) 10^(LA)`
similarly `I_(B) = I_(0) 10^(LB)`
`therefore (I_(A))/(I_(B)) = (10^(LA))/(10^(LB)) = (10)^(LA - LB)`
Hence correct choice is (c) .