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hey, im look over some equations given to me by my instructor, and im reading the book and i cannot find what they do

k= 2(pi) / wavelength...................what is k

and theta_p = tan^-1 (n2/n1) what is theta_p

and dx/L = m(wavelength) what is d and x what does this find.....

thanks in advanced,,,,, great website

k= 2(pi) / wavelength...................what is k

and theta_p = tan^-1 (n2/n1) what is theta_p

and dx/L = m(wavelength) what is d and x what does this find.....

thanks in advanced,,,,, great website

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