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What is the frequency of radiation with wavelength of 254nm?
I have wracked my brain. If someone could explain this to me, I'd greatly appreciate it. I know it has to do with f=c/l, but I can't plug it right to find the answer I need.
5 Answers
- RichardLv 69 years agoFavorite Answer
There's a short cut you can use.
300,000 / wavelength (in nm) = Frequency (in THz)
300,000 / Frequency (in THz) = wavelength (in nm)
This works infar-red, ultra-violet and visible light.
300000/254= 1181.1 THz.
- 9 years ago
The formula is :
frequency (f)= speed of light (c) / wavelength (^)
f = (3 X 10^8)/(254 X 10^-9)
= 1.18 X 10^15 Hz.
- 9 years ago
f = c/l is the right equation. C is the speed of light, which is also the speed of the wave. The l is the wavelength. If you divide meters per second(velocity) by meters per cycle(length per cycle/wave) you get cycles per second, which is Hertz, the units for frequency. If you look at the equation with just units, (m/s) for C, and (m/cycle) for l, it is easy to understand.
C/l = (m/s)/(m/cycle) = cycles/s = Hz
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