Part A Problem 21.60 For what visible wavelengths of light do the reflected wave

Question

Part A Problem 21.60 For what visible wavelengths of light do the reflected waves interfere constructively? Express your answer numerically. If there is more than one answer, enter your answers in ascending order separated by commas A sheet of glass is coated with a 497-nm-thick layer of oil (1.42). = 470 nm Submit My Answers Give Up Correct Part B For what visible wavelengths of light do the reflected waves interfere destructively? Express your answer numerically. If there is more than one answer, enter your answers in ascending order separated by commas 478,724 nm Submit My Answers Give Up

Explanation / Answer

B)

given --> wavelength of 470 nm  

so,

path difference = 1 * wavelength

path difference = 1 * 470 nm

for destructive interferences, apply:

PD = (path diff.) = (1 + 0.5) * WL

470 nm = 1.5 * wavelength

WL = 470/1.5

WL = 313.33 nm

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