A double convex lens is made of glass of refractive index 1.55 with both faces of same radius of curvature. Find the radius of curvature required, if focal length is 20 cm .
A double convex lens is made of glass of refractive index 1.5. If its focal length is 30 cm, then radius of curvature of each of its curved surface is
Double convex lenses are to be manufactured from a glass of refractive index 1.55, with both faces of the same radius of curvature. What is the radius of curvature required if the focal length of the lens is to be 20 cm?
A double convex lens of glass of refractive index 1.6 has its both surfaces of equal radii of curvature of 30 cm each. An object of height 5 cm is placed at a distance of 12.5 cm from the lens. Calculate the size of the image formed.
A double convex lens of focal length 6 cm is made of glass of refractive index 1.5. The radius of curvature of one surface is double that of the other surface. The value of smaller radius of curvature is
A double convex lens has two surfaces of equal radii R and refractive index m=1.5, we have
A double convex lens made of glass of refractive index 1.56 has both radii of curvature of magnitude 20 cm . If an object is placed at a distance of 10 cm from this lens, find the position of image formed.
A convex lens (with material of refractive index of 3/2) has two surfaces of equal radii of curvature R. The magnitude of its focal length is
