Convex and concave lens · उत्तल और अवतल लेंस
Magnifying glass or peephole — convex or concave?
Convex and concave lens games
Lenses · लेंस
| Convex (उत्तल) | Concave (अवतल) |
|---|---|
| Thicker in the middle; converges light | Thinner in the middle; diverges light |
| Real or virtual image; magnifies when close | Always virtual, upright, smaller |
| Magnifying glass, camera, microscope, spectacles for hypermetropia | Spectacles for myopia, door peephole |
Power P = 1/f (f in metres), unit dioptre (D).
For Class 8 to 10 (NCERT Curiosity 8, “Light: Mirrors and Lenses”). See also reflection of light.
A one-page chart to stick on the wall, and a worksheet to practise.
Convex and concave lens
Convex: converging, magnifier, hypermetropia. Concave: diverging, myopia.
kheloaurseekho.in — free charts, games and worksheets
Convex and concave lens — worksheet
Name: ____________________ Class: ______ Date: __________
1. Draw a convex and a concave lens.
2. Which lens corrects myopia? Why?
kheloaurseekho.in — free charts, games and worksheets
