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Microscopic Point-of-View:

Lecture 39. Microscopic Point-of-View:. Interaction between EM waves and the medium Specifically; with electrons in the medium: Resultant electric fields are complex o riginal field, radiation field, re-radiation field. Macroscopic Description. Light wave + Wave front

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Microscopic Point-of-View:

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  1. Lecture 39 Microscopic Point-of-View: • Interaction between EM waves and the medium • Specifically; with electrons in the medium: • Resultant electric fields are complex • original field, radiation field, re-radiation field... Macroscopic Description • Light wave + Wave front • Light particles (photons) speed in medium: • n = index of refraction • Wavefront • f = f’ (determined by oscillating frequency of original source)

  2. Refraction Phenomena Snell’s Law:

  3. Clicker IQ 38.1c

  4. Clicker Question Explanation • from IQ Library • I.Q. 36.1c Explanation: Small angle approximation

  5. Total Reflection Region Time Reversed Situation

  6. Reflection/Refraction Critical Angle As θ2 increases, θ1 increases more rapidly At critical angle, θ2 = θc θ1 = 90°

  7. Application: Optical Fiber [Ch24.HW4.009] Total reflection region

  8. Derivation of Snell’s Law

  9. Prism Color Dispersion At each surface, the light ray is bending Violet light has more bending than red

  10. Two Prisms Convergent Divergent

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