- Power of a lens increases as its focal length decreases.
- Power is the reciprocal of focal length.
- Lens is not used in pinhole camera.
- The lens in human eye - convex lens.
- Power of a lens is measured in Dioptre.
- Convex lens is thicker at the centre and narrower at the edges.
- Lens is not used in pinhole camera.
- Image formed in convex lens - Real and inverted.
- Concave lens is narrower at the centre and thicker at the edges.
- Focal length and power of a concave lens is always negative.
- Focal length and power of a convex lens is always positive.
Monday 26 December 2016
Lens - Important Physics Questions For Kerala PSC Exam
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