282426 A thin convex lens of refractive index 1.5 has 20 cm focal length in air. If the lens is completely immersed in a liquid of refractive index 1.6, its focal length will be

282427 A Plano-convex lens is made of material of refractive index of 1.6. The radius of curvature of curved surface is \(60 \mathrm{~cm}\). The focal length of the lens is

282428 At what distance from a biconvex lens of the focal length \(\mathrm{F}\), must be placed an object for the distance between the object and its real image to be minimum?

282429 Consider a point object situated at a distance of \(30 \mathrm{~cm}\) from the centre of sphere of radius \(2 \mathrm{~cm}\) and refractive index 1.5 as shown in the figure. If the refractive index of the region surrounding this sphere is 1.4 , then the position of the image due to refraction by sphere with respect to the centre is

282426 A thin convex lens of refractive index 1.5 has 20 cm focal length in air. If the lens is completely immersed in a liquid of refractive index 1.6, its focal length will be

282427 A Plano-convex lens is made of material of refractive index of 1.6. The radius of curvature of curved surface is \(60 \mathrm{~cm}\). The focal length of the lens is

282428 At what distance from a biconvex lens of the focal length \(\mathrm{F}\), must be placed an object for the distance between the object and its real image to be minimum?

282429 Consider a point object situated at a distance of \(30 \mathrm{~cm}\) from the centre of sphere of radius \(2 \mathrm{~cm}\) and refractive index 1.5 as shown in the figure. If the refractive index of the region surrounding this sphere is 1.4 , then the position of the image due to refraction by sphere with respect to the centre is

282426 A thin convex lens of refractive index 1.5 has 20 cm focal length in air. If the lens is completely immersed in a liquid of refractive index 1.6, its focal length will be

282427 A Plano-convex lens is made of material of refractive index of 1.6. The radius of curvature of curved surface is \(60 \mathrm{~cm}\). The focal length of the lens is

282428 At what distance from a biconvex lens of the focal length \(\mathrm{F}\), must be placed an object for the distance between the object and its real image to be minimum?

282429 Consider a point object situated at a distance of \(30 \mathrm{~cm}\) from the centre of sphere of radius \(2 \mathrm{~cm}\) and refractive index 1.5 as shown in the figure. If the refractive index of the region surrounding this sphere is 1.4 , then the position of the image due to refraction by sphere with respect to the centre is

282426 A thin convex lens of refractive index 1.5 has 20 cm focal length in air. If the lens is completely immersed in a liquid of refractive index 1.6, its focal length will be

282427 A Plano-convex lens is made of material of refractive index of 1.6. The radius of curvature of curved surface is \(60 \mathrm{~cm}\). The focal length of the lens is

282428 At what distance from a biconvex lens of the focal length \(\mathrm{F}\), must be placed an object for the distance between the object and its real image to be minimum?

282429 Consider a point object situated at a distance of \(30 \mathrm{~cm}\) from the centre of sphere of radius \(2 \mathrm{~cm}\) and refractive index 1.5 as shown in the figure. If the refractive index of the region surrounding this sphere is 1.4 , then the position of the image due to refraction by sphere with respect to the centre is