LIGHT WORKSHEET, WAVELENGTH, FREQUENCY AND ENERGY

 

Name___________________________   Date___________________   Period_______

 

Useful Information You May Need:

 

Red                 700 ‑ 650 nm               ______________1. Which has the greater l blue or indigo light? (blue)

Orange            649 ‑ 580 nm

Yellow               579 ‑ 575 nm              

Green               574 ‑ 490 nm              ______________2. Which has the greater n red or yellow light? (yellow)

Blue                  489 ‑ 455 nm

Indigo               454 ‑ 425 nm              ______________3. Which has the greater energy, a photon of yellow

  Violet              424 ‑ 400 nm                                                    light or a photon of green light? (green)

 

 

______________4. Which has the longer wavelength, light with a frequency of 7.32 X 1014 Hz or light with a

 frequency of 6.0 X 1014 Hz? (6.0 X 1014 Hz; it has lower frequency; wavelength and frequency

 vary inversely)

 

 

 

______________5. Which has higher energy, l of 674 nm or k of 480 nm? (480 nm)

 

 

______________6. Which has a higher frequency, orange light or indigo light? (indigo)

 

 

______________7. A certain red light has a wavelength of 725 nm and another red light has a frequency of

 4.28 X 1014 /sec. Which would have higher energy per photon? (4.28 X 1014/sec; it is shorter)

 

 

 

______________8. Find the color of light whose frequency is 5.21 X 1014 cycles/sec. (yellow)

 

 

 

______________9. What is the frequency of light if its wavelength is 5.4 X 10-5CM? (5.6 X 1014 Hz)

 

 


 

______________10. Which would have the higher frequency, light of wavelength of 521 nm or light with a

 wavelength of 605 nm? (521 nm)

 

 

 

 

______________11. Which would have the longer wavelength, light with a frequency of 4.5 X 1014 Hz or light

 with a frequency of 6.19 X 1014 Hz? (4.5 X 1014 Hz)

 

 

 

 

______________12. Find the frequency of light if its wavelength is 7.3 X 105  5 picometers. (4.1 X 1014 Hz)

 

 

 

 

______________13. Find the wavelength in centimeters of light whose frequency is 7.00 X 1016 Hz.

(4.29 X 10-7‑ cm)

 

 

 

 

_______________14. Is the light in # 13 visible? How do you know? (no, 4.29 nm is too short)

 

 

 

 

 

_______________15. How many Joules of energy are there in one photon of yellow light whose wavelength  

                                     is 630 nm? (3.16 X 10-19 J)

 

 

 

 

 

_______________16. Find the color of light whose photon has 4.75 X 10-19 J of energy. (violet)

 

 

 

 

 

________________17. Which would have the longer wavelength, a photon with energy of 4.59 X 10-19 J or a

            photon with energy of 3.01 X 10-19 J? (3.01 X 10-19 J; less energy means longer waves)

 

 

 

 

 

________________18. While doing an experiment in light, Ima Dope finds that the light emitted by his  

                                      sample has a frequency of 4.62 X 1016 Hz. Help him by finding the wavelength of  

                                       the light and the color  (649 nm; orange)