ICSE-X-Physics
05: Refraction through a Lens
- #23State the condition for each of the following: (i) a lens has both its focal lengths equal (ii) a ray passes undeviated through the lensAns : 23 (i) If a lens has both its focal length equal medium is same on either side of lens.
(ii) If a ray passes undeviated through the lens it is incident at the optical centre of the lens.