Question

What is a Planck Distribution and how is it used to solve for black body radiation problems?

Answer 1

Planks law:

Planks law gives the theoretical distribution for emissive power of black body.The emissive power for is given as follows

Planks distribution as a function of wavelength for different temperature.

`E_(\lambda,b)=\frac{C_1}{\lambda^5 [exp{(C_2)/(\lambda T)-1}]}`

Where
`C_1 andC_2` is the constant.

Important points for Planks distribution

1.At the given wavelength when temperature increases then emissive power will increase.

2.When temperature is increases then then distribution shift towards the left side.

3. We can assume that sun as a black body at 5800 K.