Optician has prescribed corrective lens indicating -0.9 D. This means the lens prescribed is convex.

Optician has prescribed corrective lens indicating -0.4 D. This menas the lens prescribed is convex.

Optictan has prescribed corrective lens indicating -0.4 D. This means the lens prescribed is convex.

Lens of power +2.0D is a convex lens

Lens of power +2.0 D is a convex lens.

The image of an object, formed by a plano-convex lens at a distance of 8 m behind the lens, is real is one-third the size of the object. The wavelength of light inside the lens is 2/3 times the wavelength in free space. The radius of the curved surface of the lens is

In the displacement method , a convex lens is placed in between an object and a screen . If one of them magnification is 3 and the displacement of the lens between the two positions is 24 cm , then the focal length of the lens is :-

A point - like object is placed at 40 cm distance from a covex lens of 20 cm . Plan mirror is placed behind convex lens at 30 cm . Find the image distance by this combination.

A point object is placed at distance of 20 cm from a thin plane - convex lens of focal length 15 cm . The plane surface of the lens is now silvered . The image created by the system is :-

An object 1.5 cm in size is placed on the side of the convex lens in the arrangement (a) above. The distance between the object and the convex lens is 40 cm. Determine the magnification produced by the two-lens system, and the size of the image.