Home
Class 12
PHYSICS
The earth receives solar energy at the r...

The earth receives solar energy at the rate of 2 cal `Cm^(-2)` per minute. Assuming theradiation tobeblack body in character, estimate the surface temperature of the sun. Given that `sigma =5.67 xx10^(-8) Wm^(-2)K^(-4)` and angular diameter of the sun =32 minute of arc.

Text Solution

AI Generated Solution

To solve the problem, we need to estimate the surface temperature of the Sun based on the solar energy received by the Earth. Here’s a step-by-step solution: ### Step 1: Convert the solar energy received by Earth to SI units The energy received by the Earth is given as 2 calories per cm² per minute. We need to convert this to watts per m². 1 calorie = 4.184 joules 1 cm² = 10⁻⁴ m² 1 minute = 60 seconds ...
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • HEAT TRANSFER

    PHYSICS GALAXY - ASHISH ARORA|Exercise Illustrative Example 4.19|1 Videos

  • HEAT TRANSFER

    PHYSICS GALAXY - ASHISH ARORA|Exercise Illustrative Example 4.20|1 Videos

  • HEAT TRANSFER

    PHYSICS GALAXY - ASHISH ARORA|Exercise Illustrative Example 4.17|1 Videos

  • HEAT AND THERMAL EXPANSION

    PHYSICS GALAXY - ASHISH ARORA|Exercise UNSOLVED NUMRICAL PROBLEMS FOR PREPARATION OF NSEP, INPhO & IPhO|82 Videos

  • Kinetic Theory of Gases and Gas Laws

    PHYSICS GALAXY - ASHISH ARORA|Exercise Unsolved Numerical Problems for Preparation of NSEP, INPhO & IPhO|64 Videos

Similar Questions

Explore conceptually related problems

The sun radiates maximum energy at wavelength 4753 Å . Estimate the surface temperature of the sun, if b = 2.888 xx 10^(-3) mK .

At what temperature, a perfect black body will radiate energy at the rate of 6.48 W//cm^2 . Take, sigma = 5.67 xx 10^(-8) Wm^(-2) K^(-4)

Knowledge Check

  • The radiant power of a furnace of surface area of 0.6m^(2) is 34.2KW The temperature of the furance s [sigma = 5.7 xx 10^(-8) Wm^(-2) K^(-4) .

    A
    `3400K`
    B
    `1012K`
    C
    `1000K`
    D
    `5700K`

  • Calculate the temperature at which a perfect black body radiates at the rate of 1 W cm^(-2) , value of Stefan's constant, sigma = 5.67 xx 10^(-8) W m^(-2)K^(-4)

    A
    576 K
    B
    648 K
    C
    695 K
    D
    766 K

  • Calculate the temperature at which a perfect black body radiates at the rate of 1 W cm^(-2) , value of Stefan's constant, sigma = 5.67 xx 10^(-5) W m^(-2) K^(-8)

    A
    `576 K`
    B
    `648 K`
    C
    `695 K`
    D
    `766 K`

    • Similar Questions

    Explore conceptually related problems

    Calculate the temperature (in K) at which a perfect black body radiates energy at the rate of 5.67W cm^(-2) . Given sigma = 5.67 xx 10^(8)Wm^(-2)K^(-4) .

    The earth receives solor radiation at a rate of 8.2Jcm^(-2)min^(-1) . Assuming that the sun radiates like a blackbody, calculate the surface of the sun. The angle subtended by the sun on the earth is 0.55(@)C and the stefan constant sigma=5.67xx10^(-s)Wm^(-2)K^(-4) .

    Estimate the surface temperature of sun. Given for solar radiations, lambda_(m)=4753Å . ( b=2.89xx10^(-3) meter Kelvin)

    What will be the surface area of a filament of 200 W incandescent lamp at 2000 K. sigma = 5.67 xx 10^(-8) Wm^(-2) K^(-4) and emissivity e = 0.3?

    If the sun's surface radiates heat at 6.3 xx 10^(7) Wm^(-2) . Calculate the temperature of the sun assuming it to be a black body (sigma = 5.7 xx 10^(-8)Wm^(-2)K^(-4))

    Home
    Profile