\(power \ of \ a \ lens \ (D) = \frac{1}{focal \ length \ (m)}\) 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 ...

Difference between Concave vs Convex Lens: Isn’t physics one of those subjects that almost every student is scared of? Well why not, given the complexity of ...

We compare and contrast concave and convex lenses by drawing ray diagrams. In this Closer Look segment on Lenses, we compare and contrast concave and convex lenses by drawing ray diagrams and ...

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