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Mechanical Engineering · Q146

Heat And Mass Transfer

Engineering and GATE · Mechanical Engineering · question 146

Q146

If the energy radiated per second per sq. cm. of the surface for wave lengths lying between λ and λ + dλ is represented by (eλ.dλ), then eλ is called

A.
Absorptive power
B.
Emissive power
Answer
C.
Emissivity
D.
None of these

Answer: Option B

Solution

Answer: Option B
Solution:
If the energy radiated per second per sq. cm. of the surface for wave lengths lying between λ and λ + dλ is represented by (eλ.dλ), then eλ is called Emissive power.