There are several online sources where you can find the PDF version of "Optics by Brijlal and Subramanyam". Some popular options include:

Practical explanations of microscopes, telescopes, and cameras. 🔍 Why It’s a Student Favorite

The PDF of Brij Lal & Subramanyam’s Optics is widely available for reference. While PDFs are convenient for quick searching and on-the-go study, I strongly recommend buying a physical copy if you’re serious about physics. The diagrams, margin notes, and ease of flipping between sections are unmatched.

Optics is notorious for "plus and minus" errors. Pay close attention to the Cartesian sign convention the authors establish early on.

The 23rd Revised Edition includes multicolour illustrations to better visualize optical phenomena. Where to Find It

The search term is searched thousands of times per month. It signals a genuine thirst for physics knowledge, which is admirable. However, accessing a cheap, legal digital copy protects you from malware and respects the authors—Brij Lal and Subramanyam, who spent decades crafting these problems.