Antireflection Coating A glass lens ((glass) n= 1.52) has an antireflection coat

Question

Antireflection Coating

A glass lens ((glass) n= 1.52) has an antireflection coating of (MgF2 (n = 1.38))

A. For 503-nm light, what minimum thickness of (MgF2) will cause the reflected rays R2 and R4 in the figure to interfere destructively, assuming normal incidence?

B. Interference will also occur between the forward-moving rays R1 and R3 in the figure. What minimum thickness of (MgF2) will cause these two rays to interfere constructively?

Thank you!

Antireflection Coating A glass lens ((glass) n= 1.52) has an antireflection coating of (MgF2 (n = 1.38)) A. For 503-nm light, what minimum thickness of (MgF2) will cause the reflected rays R2 and R4 in the figure to interfere destructively, assuming normal incidence? B. Interference will also occur between the forward-moving rays R1 and R3 in the figure. What minimum thickness of (MgF2) will cause these two rays to interfere constructively?

Explanation / Answer

check this link http://info.adimec.com/blogposts/bid/40330/Anti-reflection-coatings-improve-accuracy-for-high-performance-cameras

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