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Mechanical Engineering · Q59

Heat And Mass Transfer

Engineering and GATE · Mechanical Engineering · question 59

Q59

According to Stefan Boltzmann law, ideal radiators emit radiant energy at a rate proportional to

A.
Absolute temperature
B.
Square of temperature
C.
Fourth power of absolute temperature
Answer
D.
Fourth power of temperature

Answer: Option C

Solution

Answer: Option C
Solution:
Stefan-Boltzmann law is applicable for radiation it states that the total radiant heat power emitted from a surface is proportional to the fourth power of its absolute temperature. The law applies only to blackbodies, theoretical surfaces that absorb all incident heat radiation.
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