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1. Intense white light is incident on a diffraction grating that has 752 lines/mm. (a) What...

1. Intense white light is incident on a diffraction grating that has 752 lines/mm.

(a) What is the highest order in which the complete visible spectrum can be seen with this grating? (Enter 1 for first order, 2 for second order, etc.)
(b) What is the angular separation between the violet edge (400 nm) and the red edge (700 nm) of the first order spectrum produced by the grating?

2. The angle of incidence of a light beam in air onto a reflecting surface is continuously variable. The reflected ray is found to be completely polarized when the angle of incidence is 63.5°.

(a) What is the index of refraction of the reflecting material?
(b) If some of the incident light (at an angle of 63.5°) passes into the material below the surface, what is the angle of refraction?

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