Electromagnetic Radiation Calculations-Key
Name:_______________________________________
1.
What is the mathematical expression between wavelength and frequency?
wavelength = speed of light/frequency
2.
What is the mathematical expression between energy and frequency?
energy = plank’s constant x frequency
3.
Use the mathematical expressions above and your electromagnetic spectrum to complete the following word problems: a.
What is the wavelength of the radiation whose frequency is 5.00x10
15
/s? In what region of the electromagnetic spectrum is this radiation?
wavelength= 6.00x10
-8
m b.
What is the wavelength of radiation with a frequency of 1.50x10
13
Hz? Does this radiation have a longer or shorter wavelength than red light?
Wavelength = 2.00x10
-5
m c.
What is the frequency of radiation with a wavelength of 5.00x10
-8
m? In what region of the electromagnetic spectrum is this radiation? frequency = 6.00x10
15
s
-1 d. Suppose that your favorite AM radio station broadcasts at a frequency of 1,600 Hz.
What is the wavelength in meters of the radiation from the station?
wavelength = 1.9x10
5
m e.An inexpensive laser that is available to the public emits light that has a wavelength of
670 nm. (1nm = 1.0x10
-9
m ) What are the color and frequency of the radiation?
frequency = 5.4x10
14
s
-1