The walls of a soap bubble have about the same index of refraction as that of pl

Question

The walls of a soap bubble have about the same index of refraction as that of plain water, n=1.33. There is air both inside and outside the bubble.

Part A

What wavelength (in air) of visible light is most strongly reflected from a point on a soap bubble where its wall is 292 nm thick?

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Part B

To what color does this correspond?

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Part C

What wavelength (in air) of visible light is most strongly reflected from a point on a soap bubble where its wall is 341 nm nm thick?

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Part D

To what color does this correspond?

The walls of a soap bubble have about the same index of refraction as that of plain water, n=1.33. There is air both inside and outside the bubble.

Part A

What wavelength (in air) of visible light is most strongly reflected from a point on a soap bubble where its wall is 292 nm thick?

=   nm  

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Part B

To what color does this correspond?

To what color does this correspond? blue red green orange

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Part C

What wavelength (in air) of visible light is most strongly reflected from a point on a soap bubble where its wall is 341 nm nm thick?

=   nm  

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Part D

To what color does this correspond?

To what color does this correspond? green blue orange red

Explanation / Answer

Part A

Here given is n= 1.33; t= 292

(m+0.5) = 2nt      (here m=1)

= (2 x 1.33x 292nm) / 1.5

= 518nm

part B

green color range 495-570 nm

So the color is green

Part C

n=1.33; t= 341nm

(m+0.5) = 2nt      (here m=1)

= (2 x1.33 x 341nm) / 1.5

=605nm

part D

orange color range is 590-620nm

so the color is orange

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