Two different materials-glass and diamond-are used to make convex lenses of the same thickness. We know that diamond can bend light more than glass. Which lens will have a greater focal length?

Open in App

Solution

The glass lens will have a greater focal length than the diamond lens.
Diamond being able to bend light rays more, a lens made of diamond will make rays of light passing through it, meet at a point nearer than a lens made of glass. Thus, focal length of a diamond lens will be smaller than that of a glass lens.

Suggest Corrections

Similar questions

Q. Two convex lenses of same thickness are used to make two different materials - glass and diamond. Which lens will have greater focal length?

Q. Two convex lenses A and B of the same aperture have thickness 1 cm and 1.5 cm respectively. Which will have a greater focal length?

Which causes more bending (or more refraction) of light rays passing through it : a convex lens of long focal length or a convex lens of short focal length ?

The smaller the focus of a convex lens more will be its magnifying capacity, so why don't we use magnifying glasses with very small focal length?

Q. Three convex lenses are available having focal lengths of

4 c m, 40 c m

and

4 m

respectively. Which one could be used as magnifying glass?

Join BYJU'S Learning Program