(a) The proof for I ( f , T ) = I ( λ , T ) | d λ / d f | .

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Chapter 4, Problem 4.3P

To determine

(a)

The proof for I(f,T)=I(λ,T)|dλ/df| .

To determine

(b)

The expression for Planck's constant in terms of frequency and its sketch at a fixed temperature.

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