(Temperature of Sun)
Esimate the temperature `T_(c )` of the earth, assuming it is in radiative equilibrium with the sun. (Assume radius of sun, `r_(s)=7xx10^(8)m`, temperature of solar surface`=6000K`, distance of earth from sun,`R=1.5xx10^(11)m`)

The distance of the Earth from the Sun is 4 times that of the planet Mercury from the Sun The temperature of the Earth in radiative equilibrium with the Sun is 290K The radiative euilibrium temperature of the Mercury is 5.80 xx 10^(n) Find the value of n Assume all three bodies to be black body .

If temperature of Sun=6000K, radius of Sun is 7.2xx10^(5)Km , radius of earth=6000 Km & distance between earth and Sun =15xx10^(7) Km. find intensity of light on earth.

If temperature of Sun=6000K, radius of Sun is 7.2xx10^(5)Km , radius of earth=6000 Km & distance between earth and Sun =15xx10^(7) Km. find intensity of light on earth.

Compares the gravitational acceleration of the eartrh due to attraction of the sun with that due to attraction of the moon. Given that mass of sun, M_(s)=1.99xx10^(30) kg, mass of moon, M_(m)=7.35xx10^(22) kg , distance of sun from earth , r_(es)=1.49xx10^(11) m and the distance moon from earth r_(em)=3.84xx10^(8) m.

The surface temperature of the sun is T_(0) and it is at average distance d from a planet. The radius of the sun is R . The temperature at which planet radiates the energy is

The surface temperature of the sun is T_(0) and it is at average distance d from a planet. The radius of the sun is R . The temperature at which planet radiates the energy is

The surface temperature of the sun is about 6000K. If the temperature of the sun becomes twice the present temperature, then [b = 2.9xx10^(-3)mK ]

Compute the surface temperature of the sun from the following data: Distance of earth from the sun R=1.469xx10^(11)m Radius of the sun r=6.928xx10^(8)m Solar constant S=1.39xx10^(3)Wm^(-2) Stefan's constant sigma=5.73xx10^(-8)Wm^(-2)K^(-4)

The luminousity of a star is 10,000 times that of the sun and its surface temperature is 3000K . Assuming the surface of temperature of the sun to be 6000K , compare the radius of the star with that of the sun.