A rectangular body has maximum wavelength `lambda_(m)` at `2000 K`. Its corresponding wavelength at `3000 K` will be

Options

A. `(3)/(2) lamda_(m)`
B. `(2)/(3) lamda_(m)`
C. `(16)/(81) lamda_(m)`
D. `(81)/(16) lamda_(m)`

Answer

B

Explanation

Using Wien.s displacement law, `lamda-(m) = T=` constant
Here `lamda._(m).(3000K) = lamda_(m) (2000K) rArr lamda._(m) = (2)/(3) lamda_(m)`.
`rArr` b is correct