Electromagnetic Spectrum
Energy/Wavelength
100
Are wavelength and frequency directly or inversely related to each other?
Which color has a largest frequency?
Blue, Red, Yellow
Inversely. Larger wavelength = Smaller frequency
Blue.
100
What are the two formulas for finding frequency?
c = λ * v
E = h * v
200
List the following in order of wavelength:
Smallest ------------------------------- Longest
Gamma, Visible Light, Ultraviolet, Infrared, Microwave, X-ray, Radio
Smallest ------------------------------------- Longest
Gamma, X-ray, UV, VS Light, IR, Microwave, Radio
200
What is the frequency of red light with a wavelength of 740 nm?
speed of light = 2.998x108 m/s
2468 s-1
300
Which has the smallest frequency and which has the smallest energy of the following?
Gamma, visible, ultraviolet
Visible
Visible
300
A local AMP radio station broadcasts at a frequency of 705 kHz. Calculate the wavelength at which it is broadcasting.
speed of light = 2.998x108 m/s
1 kHz = 103 sec-1
425.3 m
400
Which is more dangerous, Ultraviolet or Infrared radiation?
Ultraviolet. The wavelengths are shorter, with a larger frequency.
400
A local FM radio station broadcasts at a frequency of 91.8 MHz. Calculate the energy of the frequency at which it is broadcasting.
h=6.626x10-34 J*s
(1MHz = 106 s-1)
6.08x10-29 s-1
500
Bonus Question!!! Double Points!!!
Why is Gamma radiation so dangerous? What do the waves do to our bodies?
Gamma waves are so short and sharp that they actually cut up our molecules. We are cut up so much, that we completely disappear!
500
The wavelength of a particular color of blue light is 446 nm. What is the energy of this wavelength? (kJ/photon)
speed of light = 2.998x108 m/s
h=6.626x10-34 J*s
(109 nm = 1 m)
4.44x10-22 kJ/photon