" Solar Constant "

The average amount of energy received on a surface perpendicular to incoming radiation at the top of the atmosphere is called (1) Solar radiation (2) Electromagnetic spectrum (3) Solar constant (4) Electromagnetic constant

An earth- orbiting satellite has a solar energy collecting panel with total area 5 m^2 If solar radiations are perpendicular and completely absorbed, the average force associated with the radiation pressure is (Solar constant = 1.4 k Wm^(-2) )

An earth- orbiting satellite has a solar energy collecting panel with total area 5 m^2 If solar radiations are perpendicular and completely absorbed, the average force associated with the radiation pressure is (Solar constant = 1.4 k Wm^(-2) )

The solar constant for the earth is about 1.8J//m^(2)//s . What is the solar constant for a black body situated on a planet which is situated at a distance of 0.3 times the distance of the earth from the sun ?

The solar constant is the amount of heat energy received per second per unit area of a perfectly black surface placed at a mean distance of the Earth form the Sun, in the absence of Earth's atmosphere, the surface being held perpendicular to the direction of Sun's rays. Its value is 1388 W//m^(2) . If the solar constant for the earth is 's'. The surface temperature of the sun is TK,D is the diameter of the sun, R is the mean distance of the Earth from the sun. The sun subtends a small angle 'theta' at the earth. Then correct options is/are:-

The solar constant is the amount of heat energy received per second per unit area of a perfectly black surface placed at a mean distance of the Earth form the Sun, in the absence of Earth's atmosphere, the surface being held perpendicular to the direction of Sun's rays. Its value is 1388 W//m^(2) . If the solar constant for the earth is 's'. The surface temperature of the sun is TK,D is the diameter of the sun, R is the mean distance of the Earth from the sun. The sun subtends a small angle 'theta' at the earth. Then correct options is/are:-

Sunrays are allowed to fall on a lens of diameter 20 cm. They are then brought to focus on a calorimeter containing 20 g of ice. If the absorption by the lens is neglible, the time required to melt all the ice is (solar constant = 1.9 cal min^(-1) cm^(-2) and L = 80 calg^(-1) )

Sunrays are allowed to fall on a lens of diameter 20 cm. They are then brought to focus on a calorimeter containing 20 g of ice. If the absorption by the lens is neglible, the time required to melt all the ice is (solar constant = 1.9 cal min^(-1) cm^(-2) and L = 80 calg^(-1) )