ELEC 262 - Problem Set 3 Due: In class, Wednesday, Jan. 28 Reading: Hecht, Chapter 3 and section 4.8 1(a). Consider an electron living inside a block of glass. If this block of glass is illuminated with radio waves, is the electric field experienced by the electron smaller than, larger than, or the same as, the electric field of the radio waves outside of the glass? Explain. (b) If instead of radio waves, we had used a visible light source such as a laser, how would the answer to (a) have changed (if at all)? Explain. 2. Water molecules, when they are in the gas phase, can strongly absorb electromagnetic radiation at a frequency of ν0= 557 GHz, due to a rotational energy level transition at that frequency. This transition has a damping rate of Γ= 2π×200 MHz (where we have defined Γin lecture). For a particular situation (i.e., a particular number density of water molecules), we observe that the maximum absorption coefficient associated with this transition is αmax= 15 cm-1.
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This note was uploaded on 11/23/2009 for the course ELEC 262 taught by Professor Mittleman during the Spring '09 term at Rice.