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jjg
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A thin piece of glass with an index of refraction of n2 = 1.50 is placed on top of a medium that has an index of refraction n3 = 2.00. A beam of light traveling in air (n1 = 1.00) shines perpendicularly down on the glass. The beam contains light of only two colors, blue light with a wavelength in air of 456 nm and orange light with a wavelength in air of 608 nm.
(a) What is the minimum non-zero thickness of the glass that gives completely constructive interference for the orange light reflecting from the film?
nm
(b) What is the minimum non-zero thickness of the glass that gives completely constructive interference for BOTH the blue and orange light simultaneously?
nm
For (a)
I tried using t= ((m+.5) *wavelength(film)) /2, using m =1, and wavelength(film)= 608/1.5 = 405
I got 304 nm , but that isn't right...
(a) What is the minimum non-zero thickness of the glass that gives completely constructive interference for the orange light reflecting from the film?
nm
(b) What is the minimum non-zero thickness of the glass that gives completely constructive interference for BOTH the blue and orange light simultaneously?
nm
For (a)
I tried using t= ((m+.5) *wavelength(film)) /2, using m =1, and wavelength(film)= 608/1.5 = 405
I got 304 nm , but that isn't right...