CONVEX SURFACE

There is a plano-convex lens whose radius of curvature for convex surface is 2.5 cm. Thickness of the lens is 9 cm. When object is placed at a certain distance from the convex surface then image is formed on the plane surface of the lens which serves as screen. What should be the magnification in this case? Refractive index is 1.5.

A plano-convex lens P and a concavo-convex lens Q are in contact as shown in figure. The refractive index o fthe material of the lens P and Q is 1.8 and 1.2 respectively. The radius of curvature of the concave surface of the lens Q is double the radius of curvature of the convex surface. The convex surface of Q is silvered. An object is placed on the placed on the principal axis at a distance 10 cm form the plane surface. The image is formed at a distance 40 cm from the plane surfaces on the same side. The focal length of the system is

A plano-convex lens P and a concavo-convex lens Q are in contact as shown in figure. The refractive index o fthe material of the lens P and Q is 1.8 and 1.2 respectively. The radius of curvature of the concave surface of the lens Q is double the radius of curvature of the convex surface. The convex surface of Q is silvered. An object is placed on the placed on the principal axis at a distance 10 cm form the plane surface. The image is formed at a distance 40 cm from the plane surfaces on the same side. The focal length of the system is

A luminous point object is placed at a distance of 20 cm, from the pole of a convex spherical surface of glass. The radius of the curvature of the convex surface is 25 cm and the R.I. of the glass is 1.5. What is the distance of the image from its pole ?

A point object O is placed on the axis of a cylindrical piece of glass of refractive index 1.6 as shown in the figure. One surface of the glass piece is convex with radius of curvature 3mm. The point appeared to be at 5 mm on the axis when viewed along the axis and from right side of convex surface. The distance of the point object from the convex surface is :

A point object ‘O’ is placed on the axis of a cylindrical piece of glass of refractive index 1.6 as shown in the figure. One surface of the glass piece is convex with radius of curvature 3 mm. The point appeared to be at 5 mm on the axis when viewed along the axis and from right side of convex surface. The distance of the point object from the convex surface is

The convex surface of a thin concavo-convex lens of glass of R.l. 1.5 has a radius of curvature 20 cm. The concave surface has a radius of curvature 60 cm. The convex side is silvered and placed horizontally. Q Where should a pin be placed on the axis such that its image is formed on the same point.

Calculate the positions of the principle planes and focal points of a thick convex-concave glass lens if the curvature radius of the convex surface is equal to R_(1) = 10.0 cm and of the concave surface to R_(2) = 5.0 cm and the lens thickness is d = 3.0 cm .

At what thickness will a thick convex-cancave glass lens in air (a) serve as a telescope provided the curvature radius of its convex surface is DeltaR = 1.5 cm greater than that of its concave surface? (b) have the optical equal to -1.0 D if the curvature radii of its convex and concave surfaces are equal to 10.0 and 7.5 cm respectively ?

The radius of curvature of the convex surface of a planoconvex lens is 12 cm and its refractive index 1.5. If the plane face of the lens is silvered, then the distance from the lens at which parallel rays incident on its convex surface converge is