A hot body will radiate maximum energy if its surface is

Calculate the wavelength at which a hot body radiates maximum energy if its surface temperature is 3200^(@) C. Wien's constant 0.00289 mK.

A hot body will radiate heat most rapidly ,if its surface is

The surface temperature of the hot body is 1127^(@)C find the wavelenght at which it radiates maximum energy. Given Wien's constant = 0.2898 cm K. To which spectrum region this wavelength belongs?

A black body radiates power P and maximum energy is radiated by it at a wavelength lamda_(0) . The temperature of the black body is now so changed that it radiates maximum energy at the wavelength (3lamda_(0))/4 . What is the power radiated by it at the new temperature ?