Nature of Light and Laws of Geometric Optics. The nature of light Reflection Refraction Index of refraction Huygens’ Principle Dispersion and Prisms Total Internal Reflection. The Nature of Light. Light as Particles Tactile Theory (Ancient Greeks) Emission Theory (al-Haitham) Newton
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Suppose the sprinters wish to get from point Q on the beach to point P on the parking lot as quickly as possible. Which path takes the least time?
Going from one medium to another, the frequency of light does not change but its wavelength does.
If one of the medium’s is vacuum (n=1),
Snell’s Law of Refraction
angle of deviation
Critical Angle, qc
Only for n1 > n2
For q<qc: The fish sees above the water
For q=qc : The fish sees the shoreline
For q>qc : The fish sees the pond bottom
Fiber Optic Cable