Frequency
Frequency refers to how often an event occurs. High frequency events, like waves, are measured in Hertz. Lower frequency events, like comets, are often referred to by terms like "twice a century" or even how many years until an event reoccurs. Events like comets happen with predictable regularity, but a "once in 100-year flood" does not refer to frequency, rather statistical probability (every year there is a 1/100 chance that the flood would occur).
Figure 1. The electromagnetic spectrum:[1] more energy corresponds to shorter wavelength and higher frequency since all three quantities are closely related. The radiant energy of a photon can span many orders of magnitude (a factor of 1024!), but there's only a very small portion that is visible, as shown here.
For Further Reading
- Radiation
- Flood
- Drought
- Wavelength
- Or explore a random page
References
- ↑ P. Ronan, Gringer. (2013, February 19). EM spectrum revised [Online]. Available: http://upload.wikimedia.org/wikipedia/commons/3/30/EM_spectrumrevised.png
