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Solar Energy

Solar energy ...

Question

Solar energy can be obtained from

A

Radiation of sun incident on earth’s surface.

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B

Solar rays reflected by moon towards earth.

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C

Burning of coal to produce temperature comparable to sun’s temperature.

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D

None of these

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Solution

The correct option is A
Radiation of sun incident on earth’s surface.

Solar energy is obtained from the solar radiation which is directly incident upon the earth. It is the ultimate source of all forms of energy available on earth.

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Similar questions

Q. The solar constant for the earth is

S

. The surface temperature of the sun is

T K

. The sun subtends an angle

θ

Q. 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 from the Sun, in the absence of Earths atmosphere, the surface being held perpendicular to the direction of Suns rays. Its value is

1388 W / m^{2}

.If the solar constant for the earth is

s

. The surface temperature of the sun is

T K

D

is the diameter of the Sun,

R

is the mean distance of the Earth from the Sun. The sun subtends a small angle

θ

at the earth. Then correct options is/are :

Q. Solar energy is obtained from the radiation of the Sun which is incident on the Earth’s surface.

Q. Solar constant is the amount of solar energy incident perpendicularly per unit time on unit surface area of the earth at an average distance between the Sun and the earth. Its value in

S_{0} = 1340 w / m^{2}

. Here calculate temperature of the Sun's surface.
Radius of the Sun

R_{s} = 7 \times 10^{8} m

Average distance between the earth and the Sun

R_{0} = 1.5 \times 10^{11} m

σ = 5.67 \times 10^{- 8} W m^{- 2} K^{- 4}

Q. The solar constant for the earth is

Σ

. The surface temperature of the sun is

T

K. The sun subtends an angle

θ

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