Calculate the penetration depth of the evanescent field. The angle of incident light is 65° and the wavelength is 550 nm.

2) Light from glowing hydrogen contains many discrete spectral lines, of which two are Ha (hydrogen-alpha) and HB (hydrogen-beta), with wavelengths of 656.3 nm and 486.1 nm, respectively. Find the first-order angular separation between these wavelengths in a spectrometer that uses a grating with 6000 slits per cm.

1. Starting from its electric field componenets: E = E#0 Cos(wt + yx); Ey = Eyo cos(wt + Yy) derive the following general expression for polarization of light: %3D E E E, Ey cos 8 = sin? S Ex0 Eyo where 8 = 8, - 8p.

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