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Mechanical Engineering · Q33

Heat And Mass Transfer

Engineering and GATE · Mechanical Engineering · question 33

Q33

Depending on the radiating properties, a body will be white when (Where a = absorptivity, p = reflectivity, x = transmissivity)

A.
p = 0, x = 0 and a = 1
B.
p = 1, T = 0 and a = 0
Answer
C.
p = 0, x = 1 and a = 0
D.
x = 0, a + p = 1

Answer: Option B

Solution

Answer: Option B
Solution:
Depending on the radiating properties, a body will be white when p = 1, T = 0 and a = 0
(Where a = absorptivity, p = reflectivity, x = transmissivity)