If a blue light has a wavelength of 5.50 x 10^-7 (550 nanometers), what is the frequency of the light?

Question

If a blue light has a wavelength of 5.50 x 10^-7 (550 nanometers), what is the frequency of the light?

Question #99388. Asked by dani_1993_elle.
Last updated Dec 26 2016.

markswood
Answer has 4 votes

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markswood
17 year member
578 replies avatar

Answer has 4 votes.

Currently voted the best answer.

If a blue light had a wavelength of 550nm, it would technically be a green light.

Ref:

https://en.wikipedia.org/wiki/Green

Forgetting the colour for a minute as per my earlier post, a 550nm wavelength would translate to a frequency of about 545.454 THz (terahertz).
This handy calculator can convert wavelength to frequency or vice versa.

https://en.wikipedia.org/wiki/Visible_spectrum

It's only in micrometres and gigahertz, so you have to multiply up or down.

Response last updated by satguru on Dec 26 2016.
Sep 12 2008, 2:16 PM

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Answer 1

Frequency is how many complete waves go by per second.

Frequency is measured in Hertz = Hz = 1/seconds.
If a wave with a wavelength of 2 meters is going by at a speed of 6 meters/second, then 3 complete waves go by in 1 second. That is, the frequency is 6/2 = 3 waves/second, or 3 Hz.

.uoregon.edu/~soper/Light/frequency.html