Question

The frequency of red light is 4.8 * 10^14 Hz. The speed of light is 3 * 10^8 m/s. Find its wavelength in nm.
A 600
B 400
C 700
D 300​

Answer 1

Answer:

600

Explanation:

Wavelength relates to frequency as follows:

λ=vf

in which f is the frequency, v is the speed of light, and λ is the wavelength.

Filling this in for the example:

v=3⋅108ms

f=4.47⋅1014Hz=4.47⋅1014s−1

λ=3⋅108ms4.47⋅1014s−1=6.71⋅10−7m

from m to nm is ⋅109

So the wavelength is: 671nm (red light).