Answer #1 . . . convergence
Answer #2 . . . focus
focal point
While the term light 'rays' is a 400 year old artifact and may give a misguided idea of what the visible part of the em wave spectrum is, the point at which the optical axis of a part of the incident plane of a light wave focused by a lens is called the FOCAL POINT of the lens. (It is not of course IN the lens).
The lowest point on a Sound or light wave is called a trough.
It is the point at which light comes to a focus at a single point in space at a certain distance from the mirror relative to its curvature.
a trough
A prism tends to do the trick or any shape that comes to a point.
While the term light 'rays' is a 400 year old artifact and may give a misguided idea of what the visible part of the em wave spectrum is, the point at which the optical axis of a part of the incident plane of a light wave focused by a lens is called the FOCAL POINT of the lens. (It is not of course IN the lens).
The focal point?
The lowest point on a Sound or light wave is called a trough.
When light rays are converted on one point of focus is called compound light.
what is the pitch point
It is the point at which light comes to a focus at a single point in space at a certain distance from the mirror relative to its curvature.
A light-half, I believe.
a trough
A prism tends to do the trick or any shape that comes to a point.
equilibrium
Point-source pollution
Convergent.