Final answer:
The two properties used to identify a light wave on the electromagnetic spectrum are its wavelength and frequency. Amplitude, speed, and color do not scientifically identify it on the spectrum.
Step-by-step explanation:
The two properties of a light wave that are used to identify it on the electromagnetic spectrum are its wavelength and frequency. These two properties are inversely proportional to each other. The longer the wavelength, the lower the frequency, and vice versa. For instance, radio waves have longer wavelengths and lower frequencies, while gamma rays have shorter wavelengths and higher frequencies.
Amplitude is related to the intensity or brightness of the light but does not identify it on the electromagnetic spectrum. The speed of light is constant in a vacuum, regardless of its frequency or wavelength. Color is an outcome of wavelength and frequency and is a perception of humans and certain animals, but it is not a property used for science-based identification on the electromagnetic spectrum.
Learn more about Properties of Light