Differentiate between.Convex and concave lensVirtual images and real imagesMyopia and hypermetropiaFar point and near point
a. Convex and concave lens.
Convex | Concave |
It is thick in the middle and thin at the edges. | It is thin in the middle and thick at the edges. |
It converges the parallel beam of light. | It diverges the parallel beam of light. |
It has a real focus. | It has a virtual focus. |
It has +ve power. | It has -ve power. |
b. Virtual image and real image.
Virtual | Real |
It cannot be cast on the screen. | I can be cast on the screen. |
It is always erect. | It is always inverted. |
It is formed by the... |