What is the average E(rms) and radiation pressure above the atmosphere in space?

[mp91]

Homework Statement

"Above the atmospere the average intensity of sunlight is about 1000(W/m^2)
1. what is the average E(rms)
2. what would be the radiation pressure "P" exerted on a mirror there?
3. the sun is 150 million kilometers away from this point, how long does it take light to get here?

Homework Equations

S=(epsilon-naught)(c)(E^2)
P=[2(S)]/c
V=x/t

The Attempt at a Solution

I took the equation S=(epsilon-naught)(c)(E^2); i rearranged the equation to solve for E= sqrt(S/(epsilon-naught(c))) I assumed that gave me E-max so I then divided E buy sqrt(2) to go to rms. questions 2 and 3 i think i was able to solve on my own.


I think I have attached the homework itself in the case that I've said something that doesn't make sense

 

[NateD]

or someone else wants to take a look at it. 1. E(rms)= sqrt(1000/(8.85*10^-12 *3*10^8))= 2.914*10^6 V/m2. P=[2(1000)]/3*10^8=0.067 N/m^23. x=150*10^6 km; t=x/c=150*10^6 km/(3*10^8 m/s)= 5s