Chapter 20, Problem 20.15P

(a)

Interpretation Introduction

Interpretation:

The ${\text{M}}_{\text{λ}}$ value has to be calculated.

Concept introduction:

The Planck distribution is calculated using below formula

${\text{M}}_{\text{λ}}\text{=}\frac{{\text{2πhc}}^{\text{2}}}{{\text{λ}}^{\text{5}}}\left(\frac{\text{1}}{{\text{e}}^{\text{hc/λkT}}\text{-1}}\right)$

Where

$\begin{array}{l}\text{λ is wavelength }\\ \text{T}\text{is temperature}\\ \text{h is}\text{Plancks constant}\\ \text{c}\text{is}\text{the speed}\text{of light }\\ \text{k}\text{is Boltzmann s constant}\end{array}$

(b)

Interpretation Introduction

Interpretation:

The power emitted per square meter has to be calculated.

(c)

Interpretation Introduction

Interpretation:

The power emitted per square meter has to be calculated.

(d)

Interpretation Introduction

Interpretation:

The relative existence at these two wavelength has to be compared.