Home
Class 12
PHYSICS
A black body is at a temperature of 5760...

A black body is at a temperature of 5760K. 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 constant, b = 2.88 xx 10^(6)` nmK. Which of the following is correct?

A

`U_(2)gtU_(1)`

B

`U_(1)=0`

C

`U_(3)=0`

D

`U_(1)gtU_(2)`

Text Solution

Verified by Experts

Promotional Banner

Similar Questions

Explore conceptually related problems

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 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

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

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]

Experimental investigations show that the intensity of solar radiation is maximum for a wavelength 480 nm in the visible ragion. Estimate the surface temperature of sun. (Given Wien's constant b = 2.88 xx 10^(-3) m K ).

A black body, which is at a high temperature TK thermal radiation emitted at the rate of E W//m^(2) . If the temperature falls to T/4 K, the thermal radiation emitted in W//m^(2) will be

Calculate the effective temperature of the sun . Given that the wavelength of maximum energy in the solar spectrum is 475 mm and Wien's constant is 2.898xx10^(-3) mK.

Shown below are the black body radiation curves at temperature T_(1) and T_(2) (T_(2) gt T_(1)) . Which of the following plots is correct?

A black body initially at 27^(@) C is heated to 327^(@) C. How many times is the total radiation emitted at the higher temperature than that emitted at the lower temperature ? What is the wavelength of the maximum energy radiation at the higher temperature ? Wien's constant = 2.898xx10^(-3) mK.

A black body, at temperature T K emits radiation at the rate of 81 W/m2. It the temperature falls to t=T/3 K. then the new rate of thermal radiation will be