A camera lens with index of refraction greater than 1.30 is coated with a thin transparent film of index of refraction 1.25 to e
liminate, by destructive interference, the reflection of light at wavelength λ. the light is incident perpendicularly on the lens. in terms of λ, what minimum film thickness is needed?
In the function the .72 means that each unit of time 72% of the value is retained. This means that 28% percent of the value is lost or decays because 1-0.72=0.28 or 28 percent.
