Question: For its description of the reflected intensity of light normally incident on an interface between two transparent media (a) When light is normally incident on

For its description of the reflected intensity of light normally incident on an interface between two transparent media
(a) When light is normally incident on an interface between vacuum and a transparent medium of index n, show that the intensity S2 of the transmitted light is given by S2/S1 = 4n/ (n + 1)2.
(b) Light travels perpendicularly through a diamond slab, surrounded by air, with parallel surfaces of entry and exit. Apply the transmission fraction in part (a) To find the approximate overall transmission through the slab of diamond, as a percentage. Ignore light reflected back and forth within the slab.

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