If the oil thickness is 200 nm and the index is 1.5, what (vacuum) wavelength (in nm) does a diver see looking at the same position as the scientist, but from under water?

Question

Physics

Barbara Strong

21 October, 00:15

If the oil thickness is 200 nm and the index is 1.5, what (vacuum) wavelength (in nm) does a diver see looking at the same position as the scientist, but from under water?

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Answers (1)

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Judah Conner · Answer 1

Answer: 133.33nm

Explanation: refractive index, n = real depth/apparent depth

Oil thickness = real depth = 200nm

Wavelength from under the water = apparent depth = a

n = real depth/a

1.5 = 200 / a

a = 200 / 1.5

a = 133.33nm