Jayita Ekka, Content Team
Dear student,
You are asking if the focal length of a lens is 20 cm, what is its power in diopters?
Calculating Lens Power:
Formula:
Given:
Calculation:
Therefore, the power of the lens is +5 diopters
Why is it positive?
convex lens
Additional Notes:
Therefore, if a lens has a focal length of 20 cm, its power is +5 diopters. This means it is a convex lens capable of converging light rays.
Lucknow (Uttar Pradesh)
Greater Noida (Uttar Pradesh)
Feb 18, 2025 | By: Shivani
Feb 18, 2025 | By: Soham Mitra
Gyan Bharti Institute of Technology
MIET Meerut
Radha Govind Group of Institutions
FIT Meerut
Translam Institute of Technology and Management
Shanti Institute of Technology
DIET Meerut
A.P.S. College of Education & Technology
Mandar Education Societys Rajaram Shinde College of Engineering Chiplun
GNA University
Jaya Polytechnic College
IIT Roorkee
SRM University
BITS Pilani
JPIHM Meerut