The red laser light used in supermarket scanners has a wavelength of 633 x 10-9 m. (This is 633 nanometers, 633 nm). Find the frequency of the red laser light.
To find the frequency of the red laser light, we can use the formula:
c = λ * f
Where:
c is the speed of light (approximately 3 x 10^8 meters per second),
λ is the wavelength of the light (633 x 10^-9 meters),
and f is the frequency of the light (in hertz, Hz).
Rearranging the formula to solve for f, we have:
f = c / λ
Substituting the given values, we get:
f = (3 x 10^8) / (633 x 10^-9)
Simplifying, we have:
f = (3 x 10^8) x (10^9 / 633)
f = 4.74 x 10^14 Hz
Therefore, the frequency of the red laser light is approximately 4.74 x 10^14 Hz.