Question

Fill in the blanks:
1. The phenomenon of turning back of light into the same medium on striking a polished surface is called ........................ of light.
2. A ........................ image is always inverted.
3. In a spherical mirror, if the reflecting surface is on the outside, it is called a ........................ mirror.
4. ........................ lens is thicker in the middle and thinner at the edges.

Answer 1

1. The return of light into the same medium after striking a polished surface is called reflection of light.
2. A real image is always inverted.
3. In a spherical mirror, if the reflecting surface is on the outside, it is called a convex mirror.
4. Convex lens is thicker in the middle and thinner at the edges.