Question

calculate the temperature in K at which a perfect black body radiates energy 5.67 W/cm² Given that 5.567*10^-8 W^-2 k^-4​

Answer 1

For an ideal black body emissive power is

E=

A

P

=σεT

4

where A is area of black body, σ is Stefan-Boltzmann's constant, ε is emissivity and T is temperature

σ=5.67×10

−8

Wm

−2

K

−4

for an ideal black body ε=1

then

A

P

=σεT

4

⟹5.67×10

4

=5.67×10

−8

×T

4

T

4

=10

12

T=10

3

K

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