The rate at which the radiant energy reaches the surface of earth from the sun is about 1-4 KW-m2- The distance from the earth to the sun is about 1-5 1011 m- and the radius of sun is about 0-7 109m If the sun radiates as ideal black body- what is the temperature of its surface-

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Standard VIII

Science

End Stage of Stars

The rate at w...

Question

The rate at which the radiant energy reaches the surface of earth from the sun is about 1.4 KW/m². The distance from the earth to the sun is about 1.5 10¹¹ m, and the radius of sun is about 0.7 10⁹m If the sun radiates as ideal black body, what is the temperature of its surface?

3800 K (approx)

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4800 K (approx)

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5800 K (approx)

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6800 K (approx)

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Solution

The correct option is C 5800 K (approx)
Let P be power of sun Hence energy crossing through unit area

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The rate at which the radiant energy reaches the surface of earth from the sun is about 1.4 KW/m². The distance from the earth to the sun is about 1.5 10¹¹ m, and the radius of sun is about 0.7 10⁹m If the sun radiates as ideal black body, what is the temperature of its surface?

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The surface of the earth receives solar radiation at the rate of 1400 $W m^{- 2}$ . The distance of the centre of the sun from the surface of the earth is $1.5 \times 10^{11} m$ and the radius of the sun is $7.0 \times 10^{8} m$ . Treating the sun as a back body, it follows from the above data that the surface temperature of the sun is about

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The rate at which the radiant energy reaches the surface of earth from the sun is about 1.4 KW/m2. The distance from the earth to the sun is about 1.5 1011 m, and the radius of sun is about 0.7 109m If the sun radiates as ideal black body, what is the temperature of its surface?

The correct option is C 5800 K (approx)Let P be power of sun Hence energy crossing through unit area

The rate at which the radiant energy reaches the surface of earth from the sun is about 1.4 KW/m². The distance from the earth to the sun is about 1.5 10¹¹ m, and the radius of sun is about 0.7 10⁹m If the sun radiates as ideal black body, what is the temperature of its surface?

The correct option is C 5800 K (approx)
Let P be power of sun Hence energy crossing through unit area