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Author Question: A planoconvex lens of radius R and index of refraction n is placed curved side down on flat glass ... (Read 72 times)

nelaaney

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on: Jul 28, 2018
A planoconvex lens of radius R and index of refraction n is placed curved side down on flat glass surface. This configuration is being used to measure the wavelength of light produced by a particular light source. If the radius of the dark rings produced by interference is r, what is the wavelength of the light? Assume the setup is in air.
  1. rn/mR
  2. Rn/mr
  3. mR/nr2
  4. R2/mR

Question 2

Two glass slides are separated by a thin layer of plastic. The glass has an index of refraction nglass and the plastic has an index nplastic. The two indices are not equal. If nplastic = 1.50, for what minimum non-zero thickness of plastic will the transmitted light be for a beam of wavelength 600 nm?
  1.400 nm
  2.200 nm
  3.100 nm
  4.One needs to know which of the indices is the greater to solve this.


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ndhahbi

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

4

Answer to Question 2

2


nelaaney

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Reply 2 on: Jul 28, 2018
Thanks for the timely response, appreciate it

Alyson.hiatt@yahoo.com

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Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

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