Lens
Chapter-9|Ray Optics and Optical Instrument|NCERT 12th Physics: Lens: Lens is a transparent refracting medium bounded by two surfaces, one of which must be spherical. Lenses are two types- (I) Convex or converging lens (II) Concave or diverging lens Convex Lens: A lens which is thicker at the centre and thinner at its ends is called […]