Final answer:
The equation c = λν, where c is the speed of light, λ is the wavelength, and ν is the frequency, determines the speed of light with respect to wavelength and frequency.
Step-by-step explanation:
The equation that determines the speed of light in reference to wavelength and photon frequency is c = λν, where c represents the speed of light in a vacuum, λ (lambda) denotes the wavelength, and ν (nu) signifies the frequency of the photon. For this relationship to hold mathematically, the speed of light is typically used in meters per second (m/s), the wavelength in meters (m), and the frequency in hertz (Hz). The speed of light in a vacuum is approximately 3.00 × 108 m/s. By understanding this equation, we can rearrange it to solve for either wavelength or frequency, depending on which two of the three variables are known.