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## Homework Statement

What is the y component of the magnetic field at point O at time 0.227*E-16 s?

Given: Frequency: 2.20*E16 Hz

Max value of B-field: 4.00*E-8T when t = 0 at point O

## Homework Equations

I think the following two equations could potentially be applied to the problem:

B = B_max*sin(kx-wt)

## The Attempt at a Solution

I know w = 2*Pi*f (where f is the given frequency)

t = the given time

I guess I'm not sure how to find k & x, or if this is even the correct manner in which to solve the problem.

Thanks,

x^2