Lecture 13 Notes

Lecture 13 Notes - Recap of last lecture Doppler Effect...

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Recap of last lecture f L = (v +/- v L )f S /(v +/- v S ) λ front = (v – v S )/f S λ behind = (v + v S )/f S Doppler Effect
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Electromagnetic waves occur over a wide range Where wavelength is large, frequency is small. The range extends from low energy and frequency (radio and television) to high energy and small wavelength (gamma rays).
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The visible spectrum The visible spectrum is a very small range compared to the entire electromagnetic spectrum. Visible light extends from red light at 700 nm to violet light at 400 nm. Eye sensitivity to color
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The Earth at multiple wavelengths Infrared visible Ultraviolet X-ray gamma-ray Extreme UV
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The moon at multiple wavelengths Radio Microwave Infrared visible Ultraviolet X-ray
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Maxwell’s equations unified Electricity and Magnetism into one phenomena (two sides of the same phenomena) This lead to electromagnetic waves being considered as time varying electric and magnetic fields that can propagate through space even in the
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Lecture 13 Notes - Recap of last lecture Doppler Effect...

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