Homework Statement
At what wavelength does a 100mW laser deliver 3.5 x 1017 photons in one second?
h (plancks) = 6.626x 10^-34
c = 3 x 10^8
Homework Equations
E = hf ==> E = hc / n (wavelength) ==> n = hc / E
Power = Energy / Time
The Attempt at a Solution
Energy = Power *...
Homework Statement
A long straight wire lies along the z-axis and carries an 8A current in the +z direction. Find the magnetic field (magnitude and direction) produced at x = 0.4m, y = 0, z = .3m by a .7mm segment of wire centered at the origin.
Homework Equations
B = u(0)I / 2piR...