NEET | 2016Heat TransferHard

Question

A black body is at a temperature of 5760 K. The energy of radiation emitted by the body at wavelength 250nm is U1, at wavelength 500 nm is U2 and that at 1000 nm is U3. Wien’s constant, b = 2.88 × 106 nmK.Which of the following is correct?

Options

A.

U1 = 0

B.

U3 = 0

C.

U1 > U2

D.

U2 > U1

Solution

λmin T = b
λ∝ 1T
u ∝ (T)4 ∝1(λ)4
So
u1 > u2

Create a free account to view solution

View Solution Free
Topic: Heat Transfer·Practice all Heat Transfer questions

More Heat Transfer Questions

Radius of two spheres of same material are 1 & 4 m respectively and their temp. are 4 × 103 and 2 × 103 K resp...Liquid is filled in a vessel which is kept in a room with temperature 20oC. When the temperature of the liquid is 80oC, ...The temperature of a perfect black body is 727oC and its area is 0.1 m2. If stefan′s constant = 5.67 × 10-8 w...A body takes T minutes to cool from 62oC to 61oC when the surrounding temperature is 30oC. The time taken by the body to...When a red rose is seen through green glass then rose appears :...