Express planck's radiation law in terms of wavelength (a) as opposed to frequency. hint: start by performing a change of variable from v to 2 in equation 1.7 using c = va.

Explanation:

The intensity of the radiation emitted by a black body with a certain temperature T and frequency , is given by Planck's law:

Considering the frequency range between and and the amount of energy emitted in this frequency range. Since an increase in frequency means a decrease in wavelength. Then:

Now recall that , differentiate both sides:

Replacing this in previous equation:

Rewriting as and as

Finally, we obtain Planck's radiation law in terms of wavelength

a cold ice-tea.

pour in room temperature or cold water. cover the pitcher and refrigerate. steep white or green tea for 6 to 8 hours; steep black or oolong tea for 8 to 12 hours.jun 28, 2015