ECE_4300_Homework_5_October_8 - ECE 4300 Homework 5 October...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
ECE 4300 Homework 5 October 8, 2008 Due: Wednesday, October 15, in class This will be graded S/U. You may work with others on this assignment, but by turning in this homework, and signing your name to it, you are saying that you have done the work and understand the material. 1. The relative numbers of atoms N 1 and N 2 in two energy levels E 1 and E 2 separated by E 2 - E 1 are given at thermal equilibrium by the Boltzmann ratio. Assuming identical degeneracy for each level (g 2 =g 1 ), evaluate N 2 / N 1 for the following cases: a. An optical transition, λ =500 nm, at room temperature, 300 K b. A microwave transition, v=3 GHz, at room temperature, 300 K c. A 10 GHz transition at liquid helium temperature, 4.2 K? 2. An optical transition at λ =500 nm has a N 2 /N 1 ratio of 0.1. What is the temperature of the system? 3. Consider a transition at 500 nm with a spectral linewidth of 0.1 nm and a cavity of 2 cm 3 . a.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 2

ECE_4300_Homework_5_October_8 - ECE 4300 Homework 5 October...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online