Question 136: EM waves

Question

The mean intensity of radiation on the surface of the Sun is about 108  W/m2 . The rms value of the corresponding magnetic field is closet to :

Accepted Answer

I = $${\varepsilon _0}\,C\,E_{rms}^2$$
&  E
rms
= cB
rms
I = $${\varepsilon _0}$$ C
3
B$$_{rms}^2$$
B$$_{rms}$$ = $$\sqrt {{{\rm I} \over {{ \in _0}{C^3}}}} $$
B
rms
$$ \approx $$ 10
$$-$$4

Answer

102 T

Answer

10$$-$$2 T

Answer

10$$-$$4 T

Answer

1 T

EM waves

The mean intensity of radiation on the surface of the Sun is about 108 W/m2 . The rms value of the corresponding magnetic field is closet to :

Choose the correct answer: