1. Understand the Relationship:

* Frequency (f), wavelength (λ), and the speed of light (c) are related by the following equation:

c = fλ

* Speed of light (c) is a constant: 3 x 10^8 meters per second (m/s)

2. Convert Units:

* Wavelength (λ): 6000 Angstroms = 6000 x 10^-10 meters (1 Angstrom = 10^-10 meters)

3. Solve for Frequency (f):

* Rearrange the equation: f = c / λ

* Substitute the values: f = (3 x 10^8 m/s) / (6000 x 10^-10 m)

* Calculate: f = 5 x 10^14 Hertz (Hz)

4. Convert to Megahertz (MHz):

* 1 MHz = 10^6 Hz

* Therefore: 5 x 10^14 Hz = 500,000 MHz

Answer: The frequency of a beam of red light with a wavelength of 6000 Angstroms is 500,000 MHz.