Choosing the right focal length is a crucial part of the creative decision making process for a photographer. You can have ...

Refraction is the change in direction of light when it passes from one medium to another. The working of a lens is based on the refraction of light when they pass through it. Lens is a transparent ...

A double-convex lens is compose of two convex surfaces, has a positive focal length. Normally Bi-Convex lenses are most suitable where the object and image are on opposite sides of the lens, and are ...

\(power \ of \ a \ lens \ (D) = \frac{1}{focal \ length \ (m)}\) A lens has a power of -3.33 dioptres. Calculate the focal length and state what type of lens it is.

KnowHOW team explains: A magnifying glass is a convex lens ? both its surfaces are curved outward. When light ray passes through such a lens, having arrived along a direction parallel to its axis, ...