Home
Class 11
PHYSICS
The wavelength of maximum intensity of r...

The wavelength of maximum intensity of radiation emitted by a star is 289.8nm. The radiation intensity for the star is
(Stefan's constant = `5.67×10^-8Wm^-2K^-4`, constant b = `2898mumK`).

A

5.67×`10^8` W/`m^2`

B

5.67×`10^12` W/`m^2`

C

10.67×`10^7` W/`m^2`

D

10.67×`10^14` W/`m^2`

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • HEAT AND THERMODYNAMICS

    SURA PUBLICATION|Exercise III Long Answer Questions:|24 Videos

  • HEAT AND THERMODYNAMICS

    SURA PUBLICATION|Exercise IV Numerical Problems :|16 Videos

  • HEAT AND THERMODYNAMICS

    SURA PUBLICATION|Exercise Value Based Question|1 Videos

  • GRAVITATION

    SURA PUBLICATION|Exercise VALUE BASED QUESTIONS|4 Videos

  • KINEMATICS

    SURA PUBLICATION|Exercise Creative Question (HOTS)|12 Videos

Similar Questions

Explore conceptually related problems

A distant star emits radiation with maximum intensity at 350 nm. The temperature of the star is

How much energy is radiated per minute from the filament of an incandescent lamp at 3000 K , if the surface area is 10^-4 m^2 and it's emissivity is 0.4 ? Stefan's constant sigma = 5.67 × 10^-8 W m^-2 K^-4

The ionization energy of hydrogen atom in the ground state is 1312 kJ "mol"^(-1) . Calculate the wavelength of radiation emitted when the electron in hydrogen atom makes a transition from n = 2 state to n = 1 state (Planck’s constant, h = 6.626 xx 10^(-34) Js , velocity of light, c = 3 xx 10^8 m s^(-1) , Avogadro’s constant, N_A = 6.0237 xx 10^23 "mol"^(-1) ).

The constant A in the Richardson-Dushman equation for tungsten is 60 xx 10^(4) A m^(-2) . The work function of tungsten is 4.5 eV . A tungsten cathode having a surface area 2.0 xx 10^(-5) m^2 is heated by a 24 W electric heater. In steady state, the heat radiated by the cathode equals the energy input by the heater and the temperature becomes constant. Assuming that the cathode radiates like a blackbody, calculate the saturation current due to thermions. Take Stefan constant = 6 xx 10^(-8) W m^(-2) K^(-4) . Assume that the thermions take only a small fraction of the heat supplied.

The operating temperature of a tungsten filament in an incandescent lamp is 2000 K and it's emissivity is 0.3 . Find the surface area of the filament of a 25 watt lamp. Stefan's constant sigma = 5.67 × 10^-8 W m^-2 K^-4

Assume that the total surface area of a human body is 1.6m^(2) and that it radiates like an ideal radiator. Calculate the amount of energy radiates per second by the body if the body temperature is 37^(@)C . Stefan constant sigma is 6.0xx10^(-8)Wm^(-2)K^(-4) .

An electron changes its position from orbit n=2 to the orbit n=4 of an atom. The wavelength of the emitted radiations is (R = Rydberg's constant)

An electron changes its position from orbit n=3 to the orbit n=4 of an atom. The wavelength of the emitted radiations is (R = Rydberg's constant)