Question

Calculate the temperature of the surface of Venus, knowing the temperature of the surface of the sun to be 6000 K. Compare your result with the true value in the literature.

Answer 1

The surface temperature of a planet can be determined by:

T = [{L_sun(1-a)}/16π]^1/4× 1/√d

Where L_sun is the luminosity of sun(energy emitted per second)

a is the albedo, is the stefan boltzman constant

After solving for planet constants , we get the form:

T = 279×(1-a)^1/4×1/√d, if distance is measured in astronomical unit

albedo for Venus is 0.75

d (distance of Venus from sun in AU) = 0.723 AU

Hence ,by putting values

T = 279×(1-0.75)^1/4× 1/√0.723

= 232.017 k