- #1

henrco

- 47

- 2

I was able to correctly calculate the answer to part 1 below but the answer to part 2 is incorrect

and I cannot see the error of my ways... any help gratefully received.

1. Homework Statement

1. Homework Statement

An electromagnetic wave has an intensity of 127 W/m2.

1) Find its rms electric field strength.

2) Find its rms magnetic field strength.

## Homework Equations

Bo = Eo/c

Brms = B/sqr(2)

## The Attempt at a Solution

Answer to part 1 : Eo = 219 V/m

Part 2

Calculate Bo = 219/2.998 x 10^8 = 7.3 x 10^-7

Brms = (7.3 x 10^-7)/sqr(2) = 5.17 x 10^-7 T

This answer for part 2, doesn't match the expected answer.