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1. The wavelength an electromagnetic wave is 215nm in water with n=1.33, find its frequency. 2.An...

1. The wavelength an electromagnetic wave is 215nm in water with n=1.33, find its frequency.

2.An optic fiber is made of clear plastic with index of refraction of 1.73, surrounded by water
n=1.33. For what minimum angle of incidence θ in degrees will light remain within the plastic fiber?

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