Lenses ലെൻസുകൾ : Concave & Convex Lens Explained | Kerala PSC Physics Class

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In this video, we provide a detailed Physics class on Lenses (ലെൻസുകൾ), focusing on concave and convex lenses. We explain the difference between mirrors and lenses, reflection vs. refraction, and image formation rules essential for Kerala PSC and SSLC exams.

📝 Topics Covered & Timestamps:

[00:00] Introduction

[01:37] Difference between Mirror & Lens (Reflection vs Refraction/അപവർത്തനം)

[03:47] Important Terms: Optic Centre, Centre of Curvature, Principal Axis

[08:08] Convex Lens (Converging) vs Concave Lens (Diverging)

[13:18] Focus & Focal Length (Real vs Virtual Focus)

[21:04] Path of Light Rays through Lenses

[24:48] Image Formation by Convex Lens (Various Positions)

[36:11] Image Formation by Concave Lens

[38:28] Image Formation Table (Easy Revision Trick)

[41:16] Uses of Concave & Convex Lenses (Myopia, Hypermetropia, Microscopes)

This class is based on SCERT textbooks and is helpful for LDC 2025, LGS, and Degree Level PSC aspirants.

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