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23 Nov 2019

A thin layer of magnesium fluoride (n = 1.38) is usedtocoat a flint-glass lens (n = 1.61). What minimumthicknessshould the magnesium fluoride film have if the reflectionof 587 nmlight is to be suppressed? Assume that the light isincident atright angles to the film.

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Beverley Smith
Beverley SmithLv2
21 Aug 2019

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Related textbook solutions

Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922

Related questions

Multiple choice question:

What is the minimum thickness of a coating of magnesium fluoride(n = 1.38) applied to glass (n = 1.50) that gives a minimumreflection for 600 nm light?

A.600 nm
B.300 nm
C.435 nm
D.109 nm
E.100 nm

According to Table 35.1, the index of refraction of flint glass is 1.66 and the index of refraction of crown glass is 1.52.

(i) A film formed by one drop of sassafras oil, on a horizontal surface of a flint glass block, is viewed by reflected light. The film appears brightest at its outer margin, where it is thinnest. A film of the same oil on crown glass appears dark at its outer margin. What can you say about the index of refraction of the oil?

(a) It must be less than 1.52.

(b) It must be between 1.52 and 1.66.

(c) It must be greater than 1.66.

(d) None of these statements is necessarily true. 

(ii) Could a very thin film of some other liquid appear bright by reflected light on both of the glass blocks?

(iii) Could it appear dark on both? 

(iv) Could it appear dark on crown glass and bright on flint glass? 

Experiments described by Thomas Young suggested this question. 

According to Table 35.1, the index of refraction of flint glass is 1.66 and the index of refraction of crown glass is 1.52. (i) A film formed by one drop of sassafras oil, on a horizontal surface of a flint glass block, is viewed by reflected light. The film appears brightest at its outer margin, where it is thinnest. A film of the same oil on crown glass appears dark at its outer margin. What can you say about the index of refraction of the oil? (a) It must be less than 1.52. (b) It must be between 1.52 and 1.66. (c) It must be greater than 1.66. (d) None of those statements is necessarily true, (ii) Could a very thin film of some other liquid appear bright by reflected light on both of the glass blocks? (iii) Could it appear dark on both? (iv) Could it appear dark on crown glass and bright on flint glass? Experiments described by-Thomas Young suggested this question.

Chapter 37, Problem 37.7OQ, According to Table 35.1, the index of refraction of flint glass is 1.66 and the index of refraction

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