Differentiate b/w concave and convex lens - Science - Light

Question

Differentiate b/w concave and convex lens

Vikas Kumar Singh · Accepted Answer

Basis for Comparison Convex Lens Concave Lens Meaning Convex lens refers to the lens which merges the light rays at a particular point, that travels through it Concave lens can be identified as the lens which disperses the light rays around, that hits the lenses Structure A convex lens is thicker in the middle and thinner at the edges A concave lens is thinner in the middle and thicker at the edges Figure

Curve Outward Inward Light Converges Diverges Focal length Positive Negative Image Virtual, upright and smaller than the object between object and the lens Real and inverted with different magnification with different position of object Virtual, upright, larger than object – behind object on the same side of the lens (regardless of the object's position) In Spectacles Used for the correction of problem in far sightedness Used for the correction of problem in short sightedness Applications Glasses , spy holes in doors, some telescopes, back window of coaches, etc Eye, camera, overhead projector, focus sunlight, projector microscope, simple telescope, glasses , magnifying glass, etc Regards

Basis for Comparison	Convex Lens	Concave Lens
Meaning	Convex lens refers to the lens which merges the light rays at a particular point, that travels through it.	Concave lens can be identified as the lens which disperses the light rays around, that hits the lenses.
Structure	A convex lens is thicker in the middle and thinner at the edges.	A concave lens is thinner in the middle and thicker at the edges.
Figure
Curve	Outward	Inward
Light	Converges	Diverges
Focal length	Positive	Negative
Image	Virtual, upright and smaller than the object between object and the lens.Real and inverted with different magnification with different position of object	Virtual, upright, larger than object – behind object on the same side of the lens. (regardless of the object's position)

In Spectacles	Used for the correction of problem in far sightedness.	Used for the correction of problem in short sightedness.
Applications	Glasses , spy holes in doors, some telescopes, back window of coaches, etc.	Eye, camera, overhead projector, focus sunlight, projector microscope, simple telescope, glasses , magnifying glass, etc