8.13) Use the formula \lambda _m T = 0.29 cm K to obtain the characteristic
temperature ranges for different parts of the electromagnetic
spectrum. What do the numbers that you obtain tell you?

Answers (1)
EM wave one wavelength is taken from the range Temperature T=\frac{0.29}{\lambda}

Radio

100 cm 2.9\times 10^{-3}K

Microwave

0.1cm 2.9 K

Infra-red

100000ncm 2900K

Light

50000 ncm 5800K

Ultraviolet

100ncm 2.9\times10^{6}K

X-rays

1 ncm 2.9\times10^8K

Gamma rays

0.01 nm 2.9\times10^{10}K

 

These numbers indicate the temperature ranges required for obtaining radiations in different parts of the spectrum

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