A red laser emits a very narrow beam at a wavelength of approximately 650 nm (650×10-9m), which corresponds to a frequency of approximately 4.61×10 14 Hz , which is a few hundred terahertz!
A red laser emits a very narrow beam at a wavelength of approximately 650 nm (650×10-9m), which corresponds to a frequency of approximately 4.61×10 14 Hz , which is a few hundred terahertz!