Respuesta :
The minimum thickness of the non-reflective coating on the camera lens to prevent of reflection of light with a wavelength of 565 nm is 102.35 nm.
What is a wavelength simple definition?
Wavelength is the distance between identical points (adjacent crests) in the adjacent cycles of a waveform signal propagated in space or along a wire.
The minimum thickness of the coating required to accomplish this is required.
If the minimum thickness if t min , it is given by the formula tmin = λ/4.n
, where n is the refractive index of the non-reflective coating which is 1.38.
Substituting λ = 565. [tex]10^{-9}[/tex] m and n = 1.38
[tex]t_{min} = \frac{565.10^{-9} }{4.138} = 102.35. 10^{-9}[/tex]m
Learn more about wavelength
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The complete question is -
A lens (n=1.52) is coated with a magnesium fuloride film (n=1.38).
(a) if the coating is to cause destructive interference in reflected light for lambda = 560 nm ( the peak of the solar spectrum), what should its minimum thickness be?
(b) At what two wavelengths closest to 560 nm does the coating cause constructive interference in reflected light?
(c) Is any visible light reflected? Explain
