Question

ORAL QUESTIONS
1. What type of lens is thicker in the middle than at the edges?
2. What effect does a convex lens have on parallel rays of light incident on it? In what way is the
effect of a concave lens different?
3. A ray of light passing through a certain point of a lens does not undergo any deviation.
What point is this?
4. What kind of lens always forms a virtual image of an object?​

Answer 1

Answer:

for 1st convex lens

for 2nd convex lens is a converging lens but concave lens is a diverging lens . convex lens usually form a virtual erect and magnified where is concave lens always form a virtual erect and diminished image. ... for 4th a convex lens always forms a virtual image