Unformatted text preview: reduce the reflection) of normally incident light at 550nm. What minimum thickness should be deposited on the lens? (Hint: 2 1 2 1 2 2 ⎟ ⎟ ⎠ ⎞ ⎜ ⎜ ⎝ ⎛ + − = n n n n r at θ =0 ° ; phase difference between two light waves is the product of propagation number (k) and path difference.) 4. Explain the phenomenon of Newton’s ring and give two examples of practical applications of Newton’s rings. )] ( exp[ t r k i E E t t ot t − ⋅ = G G G G ) cos sin ( z t x t t t n n k k G G G − − =...
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- Spring '11
- Snell's Law, Total internal reflection, Geometrical optics, Anti-reflection coating