Name ________________________________________ Date _______________ Period ____________
Wave Calculations
Equations and Constants:
c = λf c = 3.0 x 108 m/s
E = hf
h = 6.63 x 10-34 Js
1. Microwaves have a frequency of 1.0 x 109 Hz. If radar beams have a frequency of
5 x 1011 Hz, which type of radiation (microwave or radar) . . .
a) has the longer wavelength?
_______________________
b) is closer to x-rays in the spectrum?
_______________________
2. What is the wavelength of radiation having a frequency of 5.00 x 1012 Hz.
(remember that Hz = s-1)
3. A photon has energy of 2.93 x 10-25 J. What is the frequency?
4. The laser in a CD player uses light with a wavelength of 7.80 x 10-7 m. What is the
frequency?
5. What is the energy of a photon with a frequency of 2.76 x 1015 Hz?
6. A bright line spectrum contains a line with a wavelength of 5.18 x 10-7 m.
a) What is the frequency?
b) Using your answer from part a, what is the energy of the light?
7. A photon has an energy of 4.00 x 10-19 J.
a) What is the frequency?
b) Using your answer from part a, what is the wavelength?
c) Using the frequency value calculated in part a, what type of radiation is
this? (Look at the chart on the front of the paper.)
8. A photon has a wavelength of 3.20 x 10-10 m.
a) What is the frequency of this radiation?
b) Using your answer from part a, what is the energy of the photon?
c) Using the frequency value calculated in part a, what type of radiation is
this? (Use the chart on the front of the paper.)
9. What is the energy of an ultraviolet photon having a wavelength of
1.18 x 10-8 m? (Hint: this is a two-step problem. What can you find with the
wavelength value? Then use that to find the energy.)
10. A photon has an energy of 1.10 x 10-13 J. What is the photon’s wavelength?
(Hint: 2 steps!)