Question

list the seven colors of the visible light spectrum in order of increasing wavelength. your answer what is represented by letter a, in the following diagram? ray of incidence ray of reflection ray of refraction normal

Explanation:

For the first question, the seven colors of the visible light spectrum in order of increasing wavelength are a well - known concept in physics. Violet has the shortest wavelength and red has the longest among them.
For the second question, when a light ray travels from one medium (air) to another (glass), the ray of incidence is the incoming ray. The ray of reflection bounces back in the same medium (air), the ray of refraction goes into the second medium (glass), and the normal is a perpendicular line to the surface at the point of incidence.

Answer:

1. Violet, Indigo, Blue, Green, Yellow, Orange, Red
2. ray of incidence