Question

Two identical bodies have temperature 277${}^o$C and 67${}^o$C . If the surrounding temperature is 27${}^o$C , the ratio loss of heat of the two bodies during the same interval of time is (approximately)

• A. 4 : 1
• B. 8 : 1
• C. 12 : 1
• D. 16 : 1

Answer 1

The correct option is D 16 : 1

We know that emission from the body is given as:

$\frac{E_1}{E_2}=\frac{T_1^4-{T_e}^4}{T_2^4-{T_e}^4}=\frac{{550}^4-{300}^4}{{3400}^4-{300}^4}=15.84\approx \frac{16}{1}$