What is axial thickness? Is it the thickness between the two principle planes of a lens or is it just the thickness of the lens? I need the correct defintion to finish a problem.
There is a laser beam with a diameter D, in air that strikes a flat smooth piece of glass with angle @ and index of refraction of n. I need to derive and equation for the diameter of the beam in the glass wiht respect with n D, and @.
I want to know why the beam's diameter would be effected by...
ψ(y,t)=2*e^(iky)*e^(iωt) + 4*e^(iky)*e^(-iωt)
Here is my work for the problem
2e^(iky)*(e^(iωt)+2e^(-iωt)); 2e^(iky)*(cos(ωt)+i*sin(ωt)+2cos(ωt)-2i*sin(ωt));
2e^(iky)*(3cos(ωt)-isin(ωt))
How would you continue this problem?
In all but one of these problems all I need is the answers checked. I am uncertain how to do number 5 part b.
1.A wave is traveling 50 m/s to the left(this is a graph) and its wavelength is 10 meters. What is the frequency of the traveling wave?
Answer:v=λ*f; f=5 hertz. Frequency can not...