Question

what is convex lens​

Answer 1

Answer:

• A convex lens is a type of lens its covered form inside.

Example:

• Telescope.
• Flash light.

• Even our human eye is one of the best explain of convex lens as our eye is just in the same modle.

Two imp. types of lens:

1. Concave lens.
2. Convex lens.

• If a leans is concave least it will have once curve surface indie it.

The lens is like this:

• Human eye = Same as Convex lens.

Types of convex lens:

1. Plano - convex lens,
2. Concave - convex lens,
3. Double convex lens.

Answer 2

Answer

• A lens that is thicker at the middle than at the edge is called convex lens.

Some more information about Convex lens

• A concave lens can form real as well as virtual image.

• If the image is real, it is inverted .

• If the image is virtual ,it is erect .

• The size of the image is smaller for objects beyond 2F equal in size for object at 2F and larger in size for object between 2F and the lens. ( where F stand for Focal length).

• The focal length of convex lens is always positive and that of a concave lens is always negative in this convention.

• The Power of Convex Lens is positive.

• Convex len is also called converging lens because parallel beam of light incident on a convex lens converge on the other side of convex lens.

• Mathematical relations

For lens 1/v - 1/u = 1/f .

Magnification of lens m = hi/ho = v/u

power of lens P = 1/f

where

v is the image distance

u is the object distance

f is the focal length

m is the magnification of lens

hi is the height of image

ho is the height of object

P is the power of lens