1. Adjust the temperature to 10,000. At this temperature most of the energy emitted is
   1. in the red part of the spectrum
   2. in the green part of the spectrum
   3. in the blue part of the spectrum
   4. shortward of the blue part of the spectrum
   5. longward of the red part of the spectrum

   answer = 4

   
   
   

2. Adjust the temperature to 2,000. At this temperature most of the energy emitted is
   1. in the red part of the spectrum
   2. in the green part of the spectrum
   3. in the blue part of the spectrum
   4. shortward of the blue part of the spectrum
   5. longward of the red part of the spectrum

   answer = 5

   
   
   

3. Adjust the temperature to 20,000. At this temperature the peak of the emitted energy occurs at a wavelength of approximately
   1. 1400
   2. 2400
   3. 3400
   4. 4400
   5. 5400

   answer = 1

4. Adjust the temperature so that the peak wavelength occurs in the green part of the spectrum. The corresponding temperature is approximately
   1. 2500
   2. 4500
   3. 5500
   4. 6500
   5. 8500

   answer = 3

5. Now set the temperature to 4000 degrees and write down the wavelength of the peak. Now set it to 8000 degrees and write down the wavelength of the peak. The ratio of these two wavelength is
   1. 1 to 1, they are the same
   2. the value at 8000 is twice as big as the value at 4000
   3. the value at 8000 is three times as big as the value at 4000
   4. the value at 8000 is four times as big as the value at 4000
   5. the value at 8000 is twice as small as the value at 4000

   answer = 5

6. Now set the temperature to 6000 degrees and find the wavelength of the peak. If there were a black body of temperature 600 degrees, you would therefore expect the peak emission to be at a wavelength of approximately
   1. 50,000 angstroms
   2. 500,0000 angstroms
   3. 5000 angstroms
   4. 500 angstroms
   5. I don't have enough information to know

   answer = 1

   
   
   
   The next set of question are for the other applet.

7. Set the left hand side temperature to 9000 degrees. Count the total number of boxes under that red curve. Your answer is about
   1. 20
   2. 40
   3. 80
   4. 160
   5. 300
   The total number of boxes under the curve is the total area under the curve which is a measure of the total energy emitted.

8. Now set the right hand side temperature to 4500 degrees. Count the total number of boxes under the blue curve. Your answer is about:
   1. 2
   2. 4
   3. 6
   4. 8
   5. 10

9. The relation between total energy emitted and temperature is E goes as T^N. In the example above, 9000 degrees is twice as hot as 4500 degrees. Therefore, if N were say, 2. Then the total Energy would go as T². In that case, a factor of 2 increase in temperature would be equal to an increase in the area under the curve by a factor of 2² = 4.

   Does the ratio of boxes counted under the 9000 (red) curve to those counted under the 4500 (blue) curve approximately equal 4?

   1. yes
   2. no

   
   

10. What is the approximate ratio?
    1. 2
    2. 4
    3. 8
    4. 16
    5. 32

11. Given this experimental result that you have just done, what is value of N.
    1. 1
    2. 2
    3. 3
    4. 4
    5. 5