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concave lense is a piece of smooth glass that is thick from the edges and thin from centre and is used to diverge light rays.
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∙ 12y ago
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Are concave lenss used as contact lenss?
yes, they are. Contact lens back surface isn't important for the dioptric power; the frontal sourface replaces the frontal sourface of the cornea. So the light angle of incidence is modified and the light focalize correctly on the retina.
Example application of concave and convex lenss?
Compared to a uniform thickness lense, concave is where the lense is thinner towards the center of the focal point of the lense than at the thicker edge; convex is much like a magnifying glass where the lense is thicker near the center focal point than at the thinner edges.
What kind of lenss do you need in your spectacles or contact lenss?
Depends on the type of defect of the eye
Are red contacts lenss illegal?
No.
How critical are lenss for a camera?
Extremely critical.
How are lenss used in telescopes and microscopes?
to magnify it
Is a jeweller's mirror concave or convex?
concave
What is the opposite of Convex?
concave concave
What are the lenss?
A lens is a device that changes the direction of light.
Can i get my lenss replaced?
It is possible to do so - you will need to contact your optician.
Why is the objective lenss called the objective lenss on the microscope?
The objective lenses are the optical element that gathers light from the 'object' being observed and they focus the light rays to produce a real image.
Is concave a parallelogram?
Concave is a property of [irregular] polygons. A parallelogram cannot be concave.
