you are given three lenses.1)a concave lens of focal length 25 cm 2)a convex lens of focal length 1/4m 3)a convex lens of focal length 100cm
which combination out of these three lenses will form a lens of zero power
Dear Student ,
If we take the concave lens of focal length 25 cm and convex lens of focal length 1/4 m = 25 cm then their combination is zero .
Here the combination of this two lenses has the power of ,
P = 1/f + 1/f = (-1/25) +(1/25) = 0
Hope this helps you .
Regards
If we take the concave lens of focal length 25 cm and convex lens of focal length 1/4 m = 25 cm then their combination is zero .
Here the combination of this two lenses has the power of ,
P = 1/f + 1/f = (-1/25) +(1/25) = 0
Hope this helps you .
Regards