Final answer:
The two properties of electromagnetic radiation (light) are wavelength and frequency.
Step-by-step explanation:
The two properties of electromagnetic radiation (light) are wavelength and frequency. Wavelength is the distance between two consecutive peaks or troughs of a wave, while frequency is the number of wavelengths passing a fixed point in one second. These properties are related by the equation c = λv, where c is the speed of light, λ is the wavelength, and v is the frequency.