# lec10 - Lecture 10 Radiation and Quantum Mechanics Lecture...

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Lecture 10 Radiation and Quantum Mechanics Lecture 10 Purdue University, Astronomy 364 1

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Electromagnetic Radiation Duality: wave vs particle Wave Properties : wavelength ( ) , frequency ( ), propagation speed ( c ) ν = c λ Particle Properties: momentum ( p ) , energy ( ) E = h = hc , p = h = h c
Energy Units Energy: 1 eV = 1.6 x 10 -19 J = 1.6 x 10 -12 ergs 1 keV = 10 3 eV, 1 MeV = 10 6 eV, 1 GeV = 10 9 eV, 1 TeV = 10 12 eV, 1 PeV = 10 15 eV, 1 EeV = 10 18 eV E ( keV ) 12.4 λ (Å) ν ( Hz ) 2.42 × 10 17 Thermal Radiation: E ( keV ) = kT 8.617 × 10 8 T ( K )

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Radio mm and sub-mm Infrared Optical Ultraviolet X-ray Gamma-ray 3 × 10 6 ≤ ν ≤ 3 × 10 10 Hz , 10 4 ≥ λ ≥ 1 cm 3 × 10 10 ≤ ν ≤ 3 × 10 12 Hz , 10 ≥ λ ≥ 0.1 mm 3 × 10 12 ≤ ν ≤ 3 × 10 14 Hz , 100 ≥ λ ≥ 1 μ m 3 × 10 14 ≤ ν ≤ 10 15 Hz , 10 3 ≥ λ ≥ 300 nm 10 15 ≤ ν ≤ 3 × 10 16 Hz , 300 ≥ λ ≥
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## This note was uploaded on 04/23/2011 for the course ASTR 364 taught by Professor Cui,weik. during the Spring '11 term at Purdue.

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lec10 - Lecture 10 Radiation and Quantum Mechanics Lecture...

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