11-quantum - 1 Week 5 CHEM 1310 Sections L and M 1...

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Unformatted text preview: 1 Week 5 CHEM 1310 - Sections L and M 1 Important Equations c = λν c = 3 x 10 8 m per second λ = wavelength ν = frequency E = h ν h = Planck’s constant = 6.62 x 10-34 J s or h = 6.62 x 10-34 kg m 2 s-1 E photon = h ν = h c λ Week 5 CHEM 1310 - Sections L and M 2 “Quantum” Light is quantized [Max Planck, 1901] – Quite a surprise as light was thought to be continuous Energy can be gained or lost only in integer multiples of h ν . Δ E = n( h ν ) n is an integer (1,2,3,…) Each unit of size h ν is called a packet or quantum Week 5 CHEM 1310 - Sections L and M 3 Energy Has Mass! E = mc 2 m = E c 2 E = h n = h c l Ê Ë Á ˆ ¯ ˜ m = hc λ c 2 = h λ c h λ = m v h λ = m c 2 Week 5 CHEM 1310 - Sections L and M 4 Hydrogen ’s Atomic Spectrum Week 5 CHEM 1310 - Sections L and M 5 Light & Energy Are Quantized D E n = hc l n n is excited state orbitals n = 1, 2, 3, … Week 5 CHEM 1310 - Sections L and M 6 Bohr Model Niels Bohr (1885-1962 ) Nobel Prize Physics, 1922 Discrete energy levels available to electrons in which to move 3...
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This note was uploaded on 08/23/2011 for the course CHEM 1310 taught by Professor Staff during the Spring '11 term at University of Florida.

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11-quantum - 1 Week 5 CHEM 1310 Sections L and M 1...

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