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 of estimating the surface temperature of the sun based on the solar energy received by the Earth, we can follow these steps: ### Step 1: Understand the given data - Solar energy received by Earth: \(2 \, \text{cal} \, \text{cm}^{-2} \, \text{min}^{-1}\) - Convert this to SI units: \[ 1 \, \text{cal} = 4.184 \, \text{J} \] ...
Promotional Banner

Similar Questions

Explore conceptually related problems

The sun radiates energy at the rate of 6.4xx10^(7)Wm^(-2) . Calculate its temperature assuming it to be a black body.

Calculate the amount of radiant energy from a black body at a temperature of (i) 27^(@) C (ii) 2727^(@) C. sigma = 5.67xx10^(-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 temperature of the sun. The angle subtended by the sun on the earth is 0.53^(@) and the stefan constant sigma=5.67xx10^(-s)Wm^(-2)K^(-4) .

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)

Calculate the energy radiated per minute by a black body of surface area 200 cm^(2) , maintained at 127^(@) C. sigma = 5.7xx10^(-8)Wm^(-2)K^(-4)

An electric heater emits 1000W of thermal radiation. The coil has a surface area of 0.02m^(2) . Assuming that the coil radiates like a blackbody, Find its temperature. sigma=6.0xx10^(-8)Wm^(-2)K^(-2) .

Solar constant is defined as energy received by Earth per cm^(2) per minute. Find the dimensions of solar constant.

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 ).

Calculate the power of an incandescent lamp whose filament has a surface area of 0.19 cm^(2) and is at a temperature of 3645K. Emmisivity of the surface is 0.4, sigma = 5.7xx10^(-8)Wm^(-2)K^(-4) ?

The operating temperature of a tungesten filament in an indandescent lamp is 2000 K and its emissivity is 0.3 . Find the surface area of the filament of a 25 watt lamp. Stefan's constant sigma = 5.67xx10^(-8) Wm^(-2)K^(-4)