The sun radiates electromagnetic energy at the rate of 3.9× 1026 W. Its radius is 6.96× 108 m. The intensity of sunlight at the solar surface will be - (in W m- 2 )

Question

The sun radiates electromagnetic energy at the rate of 3.9× 1026 W. Its radius is 6.96× 108 m. The intensity of sunlight at the solar surface will be - (in W m- 2 ) (A) 1.4× 104 (B) 2.8× 105 (C) 4.2× 106 (D) 6.4× 107

Tardigrade Admin · Accepted Answer

Is u r f a c e=(P/A)=(3.9 × (10)26/4 × 3.14 × (6.96)2 × (10)16) =6.4× 107 W m- 2

Q. The sun radiates electromagnetic energy at the rate of $3.9 \times 1 0^{26} W .$ Its radius is $6.96 \times 1 0^{8} m .$ The intensity of sunlight at the solar surface will be - (in $W m^{- 2}$ )

$1.4 \times 1 0^{4}$

$2.8 \times 1 0^{5}$

$4.2 \times 1 0^{6}$

$6.4 \times 1 0^{7}$

$I_{s u r f a ce} = \frac{P}{A} = \frac{3.9 \times ( 10 ) ^{26}}{4 \times 3.14 \times ( 6.96 ) ^{2} \times ( 10 ) ^{16}}$
$= 6.4 \times 1 0^{7} W m^{- 2}$

Q. The sun radiates electromagnetic energy at the rate of 3.9×1026W. Its radius is 6.96×108m. The intensity of sunlight at the solar surface will be - (in Wm−2 )

1.4×104

2.8×105

4.2×106

6.4×107