Final answer:
The number of dark/light changes per degree of visual angle can vary depending on factors such as the light source, the environment, and the observer's visual system.
Step-by-step explanation:
The number of dark/light changes per degree of visual angle depends on the specific situation and context. In general, it can vary depending on factors such as the light source, the environment, and the observer's visual system.
For example, if you are observing a pattern created by interference of light waves, such as in a double slit experiment, the number of dark/light changes per degree of visual angle would depend on the number of slits or the characteristics of the diffraction grating used.