Light Reflectio...

A beam of light incident on a thin concave lens parallel to its principal axis diverges and appears to come from a point on the principal axis. Name the point :

Name the mirrors shown in figure $$(a)$$ and $$(b)$$ :

The phenomenon of light coming back after hitting a smooth plane surface is called :

The phenomenon of light passing through the object is called :

The distance between the focus and the pole of the mirror is called :

State the condition when a lens is called an equi-convex or equi-concave.

Fill in the blanks:

A ray of light incident at a point on the principal axis of a convex lens passes undeviated through the lens. What special name is given to this point on the principal axis?

A ray of light, after refraction through a convex lens emerges parallel to the principal axis. The incident ray when produced appear to come from a point on principal axis. Name the point :

The light ray which strikes any polished surface at some angle is called: