6.1: Electromagnetic Radiation
- Page ID
- 168601
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Speed of Light
Exercise \(\PageIndex{1}\)
A device emits light at 512.8 nm. What is the frequency of this radiation?
- Answer
-
5.851 x 1014 Hz
\[v = \frac{c}{\lambda }\]
\[v\;=\;(\frac{2.99\;*\;10^{8}\;ms^{-1} }{512.8\;*\;10^{-9}})\]
\[v\; = 5.8307\;*\;10^{14}\;Hz\]
Exercise \(\PageIndex{2}\)
What is the wavelength of a photon having a frequency of 75.9 THz? (1 THz = 1015 Hz)
- Answer
-
3.94 nm
Exercise \(\PageIndex{3}\)
What is the frequency of gamma ray radiation that has a wavelength of 15.6 pm?
- Answer
-
1.92 × 1019 s–1
Exercise \(\PageIndex{4}\)
If a cordless phone operates at a frequency of 6.23 × 108 s–1, what is the wavelength of this radiation?
- Answer
-
0.480 m
Exercise \(\PageIndex{5}\)
A device operates at a frequency of 1.25 x 1014 Hz. What is the wavelength of this radiation?
- Answer
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0.239 nm