What is the frequency of a red laser beam with a wavelength of 650 nm?

The frequency of a red laser beam with a wavelength of 650 nm can be calculated using the formula: frequency = speed of light / wavelength. The speed of light in a vacuum is approximately 3 x 10^8 m/s. Thus, the frequency of the red laser beam would be approximately 4.6 x 10^14 Hz.