Final answer:
The form of light measured in wavelengths, the distance between two consecutive peaks of a wave, is an aspect of light's wave characteristics. Visible light has a wavelength range of approximately 380 to 760 nm.
Step-by-step explanation:
The question is asking about the wave characteristic of light that is measured in wavelengths. Wavelength is the distance between two consecutive peaks in a wave. In the context of this information, we refer to the equation c = fλ, where c is the speed of light in a vacuum,
f is the frequency of the electromagnetic waves, and λ is the wavelength. Visible light, which is a type of electromagnetic radiation, has a wavelength range of approximately 380 to 760 nm. When a pure wavelength laser beam passes through vertical slits similar in size to its wavelength,
we can observe its wave character as it displays interference patterns of bright and dark regions. This phenomenon would not occur if light behaved only as a ray; instead, it displays both characteristics of a ray and a wave, depending on the context of the interaction with objects and openings.