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Author Question: Light from a helium-neon laser (l = 632.8 nm) is incident upon a 0.200-mm wide slit. Find the total ... (Read 138 times)

amal

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on: Jul 28, 2018
Light from a helium-neon laser (l = 632.8 nm) is incident upon a 0.200-mm wide slit. Find the total width of the central maximum 2.00 m from the slit.

Question 2

A uniform film of oil (n = 1.31) is floating on water. When sunlight in air is incident normally on the film, an observer finds that the reflected light has a brightness maximum at l = 450 nm and a brightness minimum at l = 600 nm. What is the thickness of the oil film?


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Kdiggy

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Reply #1 on: Jul 28, 2018
Answer to Question 1

1.27 cm

Answer to Question 2

343.5 nm


amal

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Reply #2 on: Jul 28, 2018
Thanks


Kdiggy

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Reply #3 on: Jul 28, 2018
Welcome :)


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