|Apr26-08, 10:14 PM||#1|
Concept based light and optics ?
1. The problem statement, all variables and given/known data
When a gas is heated, it emits red and green light. What is its color when it is cool?
What % of light is reflected from a normal window? (answer choices 0, 20, 50 and 100)
2. Relevant equations
3. The attempt at a solution
For the first question, I can't think of any answer without knowing the element (it's not given).
For the second question, I want to say 0% if it is 90 degrees to the window...but I'm clueless.
Thanks for the help!