Home
Class 12
PHYSICS
A black body is at a temperature of 2880...

A black body is at a temperature of 2880 K. The energy of radiation emitted by this object with wavelength between 499 nm and 500 nm is`U_(1)`, between 999 nm and 1000 nm is `U_(2)` and between 1499 nm and 1500 nm is `U_(3)`. The Wein's constant `b = 2.88 xx 10^(6) "nm K"`. Then

A

`U_(1)=0`

B

`U_(3)=0`

C

`U_(1)gtU_(2)`

D

`U_(2)gtU_(1)`

Text Solution

Verified by Experts

The correct Answer is:
D
Wien’s displacement law is `lambda_(m)T=b` (b = Wien’s constant)
`lambda_(m)=(b)/(T)=(2.88xx10^(6)nm-K)/(2880K)`
`lambda=1000nm`
Energy distribution with wavelength will be as follows: From the graph it is clear that
`U_(2)gtU_(1)` (in fact `U_(2)` is maximum)
Promotional Banner

Similar Questions

Explore conceptually related problems

A black body is at a temperature of 2800K The energy of radiation emitted by this object with wavelength between 499nm and 500 nm is U_(1) between 999nm and 1000nm is U_(2) and between 1499 nm and 1500 nm is U_(3) The Wien's constant b =2.80 xx 10^(6) nm K Then .

A blackbody is at a temperature of 2880K. The energy of radiation emitted by this object with wavelength between 499nm and 500nm is U_1 , between 999nm and 1000nm is U_2 and between 1499 nm and 1500 nm is U_3 . The Wien constant b=2.88xx10^6nmK . Then

A black body is at a temperature of 2880 K. The energy of radiation emitted by this object with wavelength between 4990 A and 5000A is E_(1) , and that between 9990 A and 10000 A is E_(2) . Find the ratio of E_(2) and E_(1) .

The radiation emitted by a black body at a temperature of 2618 K with the wavelength between 599 nm and 600 nm is U_a , between 1099 nm and 1100 nm is _b U and between 1599 nm and 1600 nm is U_c . If the Wien's constant is b = 2.88 xx 10^6 nm K then,

A black body is at a temperature of 5760 K . The energy of radiation emitted by the body at wavelength 250 nm is U_(1) at wavelength 500 nm is U_(2) and that at 1000 nm is U_(3) . Wien's consant, b = 2.88 xx 10^(6) nmK . Which of the following is correct?

A black body is at a temperature of 5760 K. The energy of radiation emitted by the body at wavelength 250 nm is U_(1) , at wavelength 500 nm is U_(2) and at 1000 nm is U_(3) , Wien's constant, b=2.88xx10^(6) nm K, which of the following is correct ?

Energy of radiation emitted by a black body at temperature 3000 K is u_(1) for wavelength between 8000 Å and 9000Å , u_(2) for wavelength between 9000 Å and 10000Å and u_(3) forwavelength between 10000Åand 11000Å .Which of the following is true? [Wien’s constant b=2.88xx10^(-3)mK]

Compare the energies of two radiations E_(1) with wavelength 800 nm and E_(2) with wavelength 400 nm.