Name___________________________________________ Tchr____________________Pd_____Date_______________
The Electromagnetic Spectrum – Analyzing Light Energy.
 c = λν
 c = speed of light = 3.00 x 108 meters per second (m/s)
 wavelength (λ) should be expressed in meters (m)
1
 frequency (ν) should be expressed in reciprocal seconds (s–1, , or Hz)
𝑠
1. What is the frequency of radiation with a wavelength of 3.82 x 10–7 m? What part of the electromagnetic spectrum
does this fall in? (see electromagnetic spectrum)
2. What wavelength of radiation has a frequency of 3.40 x 1018 Hz? What part of the electromagnetic spectrum does this
fall in?
3. What is the frequency of red light if the wavelength is 7.60 x 10–7 m?
4. The green light associated with the aurora borealis is emitted by excited oxygen atoms. Its wavelength is 5.58 x 10–7
m? What is the frequency of this green light?
5. Gamma rays have frequencies around 1.0 x 1021 Hz. What wavelength does this correspond to?
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E = h ν (Planck’s constant x frequency of the EM radiation)
h = Planck's constant = 6.626 x 10–34 Joule seconds (J∙s)
1
6. How much energy does a photon of light with frequency 4.2 x 108 have? What part of the electromagnetic spectrum
𝑠
does this fall in?
7. It takes 6.63 x 10–18 J of energy to eject an electron from a certain atom. What frequency of light is this? What part of
the electromagnetic spectrum does this fall in?
8. What is the energy of a photon of light with a wavelength of 6.10 x 10–7 m? Hint: you need to use the equation from
Part 1 also! What color is this light?
9. What wavelength of light has energy of 3.01 x 10–19 J? What kind of radiation is this?
10. What type of radiation has a frequency of 8.6 x 1011 s-1?
11. What type of radiation has a wavelength of 4.2 nm.
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Put glue into this box. Glue into lab book.
c = λν
c = speed of light = 3.00 x 108 meters per second (m/s)
wavelength (λ) should be expressed in meters (m)
1
frequency (ν) should be expressed in reciprocal seconds (s–1, 𝑠 ,
or Hz)
E = h ν (Planck’s constant x frequency of the EM radiation)
h = Planck's constant = 6.626 x 10–34 Joule seconds (J∙s)
Other notes:
I needed to know -
I needed to know –
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Name________________________________Tchr____________Pd___
Date_____________
The Electromagnetic Spectrum – Analyzing Light Energy.