Question

Question #14bf7

Answer 1

Frequency = `5.22*10^14 Hz`
Type = visible
Color = yellow-green

Explanation:

Let's start from this equation:

`c =λ*ν`

Where `c` is the speed of light (299,792,458 m/s), λ is the wavelength, and ν is the frequency of light (in `1/s` or `s^"−1"` or `Hz`). Wavelength and frequency have an inverse relationship according to the equation above.

To calculate the frequency, you need to convert the speed of light to nanometers per second (nm/s):

`299792458 m/s = 299792458*10^9 "nm"/s = 3.00*10^"17" "nm"/s`
(with three significant digits)

and then to divide it by the given wavelength in nanometers:

`ν=c/λ=(3.00*10^17 "nm/s")/"575 nm" = 5.22*10^14 " 'swings'/s (Hz)"`

The color of light is yellow-green, in the middle of visible spectrum, as you can view from here:

This explanation was elaborated by a student of mine, Mattia Ercoli, who deserved an "eight" for having done it.