radius at both sides then it called eqviconvax. The structure of this lens is opposite of the concave lense mean its inner side is thick the outer side or edges. It refracts through the lens and passes through the focal point on the far side of the lens. Contacts areconcavein shape, enabling a better, sharper…
Making concave lenses was more difficult than convex ones, which evolved naturally from the magnification observed through convex reading stones. Any convex lens will magnify, and also inaccurate medieval lenses helped presbyopes. However, concave lenses have a significant relationship with literacy, since they enable shortsighted myopes to read even small letters and to write more…
Car windscreens filter and absorb a lot of the short wavelength light that would normally trigger the darkening process. Concave mirrors—like that one they stick in your mouth at the dentist’s office—are useful for close-up work because they make the items they reflect easier to see by making them look bigger. Concave means “curving inward”…