1 Answers
Option 2 : Convex Lens
Concept:
Concave lens:
A concave lens is thin in middle and thick at the edges.
A concave lens is a spherical lens whose two surfaces are concave or bent inward.
A concave lens is also know known as a diverging lens.
Convex lens:
A convex lens is thick in middle and thin at the edges.
A convex lens is a spherical lens whose two surfaces are bent outwards.
A convex lens is also know known as a converging lens.
Explanation:
Convex Lenses are used in projectors so as to get a magnified image of the object to be shown on Screen.
Image formation by a convex lens is shown as follow:
|
Object Position |
Image Position |
Image Characteristics |
|
At Infinity |
At focal point |
Point Image |
|
Moving toward 2F |
Moving from F to 2F |
Increase in Size, real, inverted and Smaller than the object |
|
At 2F |
At 2F |
Real, inverted and same size as the object |
|
Moving from 2F to F |
Moving from 2F to Infinity |
Real, inverted and larger than the object |
|
At F |
At Infinity |
Infinitely Large |
|
Moving from F to Lens |
Moving from Infinity towards the lens |
Virtual, upright and larger than the object. |