Interference Notes

Interference Notes - PHYSICS 8B Notes to help you prepare...

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PHYSICS 8B – Notes to help you prepare for Midterm 2 Things you need to know for the second midterm : - EM waves (Maxwell’s equations, wave number, wavelength, frequency, Poynting vector, the sinusoidal form of E and B fields of an EM wave, wave intensity and power) - Reflection and refraction (Snell’s law) - Ray tracing with lens and mirrors (bring straight edges to the exam) - Know how to derive the formulas of double slit diffraction and thin film interference . - Formula for resolvability for diffraction grating ----- slit: ° ≈ sin ° = ? ± where ° is the angular separation of the 2 objects (light sources), measured from the central peak to the first minimum on the screen, ± is the width of the slit ----- circular aperture: ° ≈ sin ° = 1.22 ? ² where D is the aperture diameter. - Time dilation and length contraction Thin Films : There are two things related to interference patterns: 1. path difference 2. phase difference The path difference for thin film interference is 2d, where d is the thickness of the film. In the picture I’ve inserted here, let’s say
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Interference Notes - PHYSICS 8B Notes to help you prepare...

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