- #1
madd_bm
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Homework Statement
The average intensity of sunlight reaching the Earth is 1390 W / m2. A charge of 1.60 10-8 C is placed in the path of this electromagnetic wave.
(a) What is the magnitude of the maximum electric force that the charge experiences?
1.637 N
(b) If the charge is moving at a speed of 6.00 104 m/s, what is the magnitude of the maximum magnetic force that the charge could experience?
I got part A, but I cannot figure out what to do next:
Savg - inensity
c - speed of light 3e8
ε0 - permittivity of free space 8.854e-12
Erms
formula: Erms = √(Savg / c * ε0) = 723.3975, Erms = 1/√2 * E0
Erms / .707 = 1023.038
E0 = 1023.038
E0 * q = F
F = 1.637e-5
am I suppossed to muliply by the speed? Cause it shows a wrong answer when i do that. I cannot seem to find the right formula. I am just not sure...?
Thanks.