\(power \ of \ a \ lens \ (D) = \frac{1}{focal \ length \ (m)}\) A lens has a power of -3.33 dioptres. Calculate the focal length and state what type of lens it is.

Formulas Physics for Class 10: CBSE has released the 2025 date sheet for Class 10 and the practical viva along with pre-boards are already in the process. This is time that students start revising the ...

Shini talks to us about optical instruments and how they make magnification possible. How do lenses work? How do they form images? Well, in order to understand how optics work, we have to understand ...

CBSE Class 12 practical examinations for the 2026 board exams are being scheduled in many schools during the second half of ...