What is the frequency of red light with a wavelength of 680nm?

Answer 1

The frequency of red light with a wavelength of 680 nm can be calculated using the equation:

frequency (v) = speed of light (c) / wavelength (λ)

where the speed of light is 3.00 x 10^8 m/s.

First, we need to convert the wavelength from nanometers to meters by dividing by 10^9:

λ = 680 nm / (10^9 nm/m) = 6.80 x 10^-7 m

Now we can plug in the values:

v = (3.00 x 10^8 m/s) / (6.80 x 10^-7 m)

v = 4.41 x 10^14 Hz

Therefore, the frequency of red light with a wavelength of 680 nm is 4.41 x 10^14 Hz.