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Kennesaw State University Physics 2212
CH. 35 Light Kennesaw State University Physics 2212
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Light Energy of a photon: h = Planck’s constant = 6.63 x 10-34 J.s
Light has dual nature (wave/particle)
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Light Particle Nature (Example) Photoelectric Effect:
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Huygens’s Principle “Any wave front can be taken as a series of point sources for the wave propagation”
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Other Characteristics of Light
Light is quantized like charge Frequency and wavelength can change and relate via equation: Light has speed (“c”) of 3.00 x 108 m/s
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Electromagnetic Spectrum
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Speed of Light In a vacuum: In a medium: Where n = index of refraction
Example: nvacuum= nair=1.01
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Snell’s Law Snell’s Law of Refraction Equation:
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Snell’s Law Critical Angle
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