Ray Optics often overwhelms Class 12 students due to formulas and sign conventions. An expert board examiner explains why ...

THE author tells us that this book is the outcome of a series of lectures which he has given at the Moorfields Eye Hospital to candidates for the new Ophthalmic Diploma of the Conjoint Board of ...

Most people know that light travels in a straight line unless something acts upon it to change its direction. The three most common methods of changing the direction of light are refraction, ...