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Question

Physics Question on Waves

The SISI unit of intensity of wave is

A

W m2W \, m^{2}

B

J m−1 s−2J \, m^{-1} \, s^{-2}

C

W m−2W\, m^{-2}

D

J m−2 SJ \, m^{-2} \, S

Answer

W m−2W\, m^{-2}

Explanation

Solution

Intensity of wave =\frac{\text{Energy}}{\text{Area \times Time}} =Jm2×s=W m−2=\frac{J}{m^{2} \times s}=W\,m^{-2} ∴\therefore The SISI unit of intensity of wave is W m−2W\,m^{-2}.