| *BASIS FOR COMPARISON | CONVEX MIRROR | CONCAVE MIRROR |
| Meaning | Convex mirror implies the mirror whose reflecting surface is away from the center of curvature. | Concave mirror refers to the mirror whose reflecting surface is towards the center of curvature. |
| Shape |  |
 |
| Center of curvature | Lies behind the mirror | Lies in front of the mirror |
| Type | Diverging mirror | Converging mirror |
| Image | Virtual image is formed. | Real or virtual image is formed. |
| Used as | Rear view mirrors in cars and bikes. | Reflectors in projectors, searchlights etc. |
| **BASIS FOR COMPARISON | CONVEX LENS | CONCAVE LENS |
| Meaning | Convex lens refers to the lens which merges the light rays at a particular point, that travels through it. | Concave lens can be identified as the lens which disperses the light rays around, that hits the lenses. |
| Figure |  |
 |
| Curve | Outward | Inward |
| Light | Converges | Diverges |
| Center and edges | Thicker at the center, as compared to its edges. | Thinner at the center as compared to its edges. |
| Focal length | Positive | Negative |
*Source: https://keydifferences.com/difference-between-convex-and-concave-mirror.html
**Source: https://keydifferences.com/difference-between-convex-and-concave-lens.html