Thin Lenses and Lens Maker's Formula

JEE Main Physics · Ray Optics · 23 questions, latest first

• A convex lens is made from glass material having refractive index of 1.4 with same radius of curvature on both sides. The ratio…20264 April, Shift 2 · Q41
• If sunlight is focused on a paper using convex lens, it starts burning the paper in shortest time when the lens is kept at 30 cm…20262 April, Shift 2 · Q49
• The magnitudes of power of a biconvex lens (refractive index 1.5) and that of a plano-concave lens (refractive index =1.7 ) are…202628 January, Shift 1 · Q43
• A convex lens of refractive index 1.5 and focal length f=18 cm is immersed in water. The difference in focal lengths of the given…202628 January, Shift 1 · Q46
• The size of the images of an object, formed by a thin lens are equal when the object is placed at two different positions 8 cm…202623 January, Shift 2 · Q49
• A lens having refractive index 1.6 has focal length of 12 cm, when it is in air. Find the focal length of the lens when it is…20257 April, Shift 1 · Q42
• The radii of curvature for a thin convex lens are 10 cm and 15 cm respectively. The focal length of the lens is 12 cm. The…20253 April, Shift 1 · Q42
• A bi-convex lens has radius of curvature of both the surfaces same as 1 / 6 cm. If this lens is required to be replaced by…20252 April, Shift 2 · Q37
• A slanted object AB is placed on one side of convex lens as shown in the diagram. The image is formed on the opposite side. Angle…20252 April, Shift 1 · Q41
• A convex lens made of glass (refractive index =1.5 ) has focal length 24 cm in air. When it is totally immersed in water…202529 January, Shift 2 · Q40
• Two identical symmetric double convex lenses of focal length f are cut into two equal parts L_1, L_2 by AB plane and L_3, L_4 by…202529 January, Shift 2 · Q41
• Let u and v be the distances of the object and the image from a lens of focal length f. The correct graphical representation of u…202529 January, Shift 1 · Q42
• A photograph of a landscape is captured by a drone camera at a height of 18 km. The size of the camera film is 2 cm × 2 cm and…202524 January, Shift 2 · Q41
• A plano-convex lens having radius of curvature of first surface 2 cm exhibits focal length of f_1 in air. Another plano-convex…202524 January, Shift 1 · Q42
• A symmetric thin biconvex lens is cut into four equal parts by two planes AB and CD as shown in figure. If the power of original…202522 January, Shift 2 · Q42
• Given below are two statements: Statement (I): When an object is placed at the centre of curvature of a concave lens, image is…20249 April, Shift 1 · Q45
• For the thin convex lens, the radii of curvature are at 15 cm and 30 cm respectively. The focal length the lens is 20 cm. The…20246 April, Shift 2 · Q46
• The distance between object and its 3 times magnified virtual image as produced by a convex lens is 20 cm. The focal length of…20241 February, Shift 1 · Q59
• The distance between object and its two times magnified real image as produced by a convex lens is 45 cm. The focal length of the…202430 January, Shift 1 · Q59
• A biconvex lens of refractive index 1.5 has a focal length of 20 cm in air. Its focal length when immersed in a liquid of…202429 January, Shift 1 · Q45
• A bi convex lens of focal length 10 cm is cut in two identical parts along a plane perpendicular to the principal axis. The power…202313 April, Shift 2 · Q59
• The radius of curvature of each surface of a convex lens having refractive index 1.8 is 20 cm. The lens is now immersed in a…202311 April, Shift 1 · Q52
• A convex lens of refractive index 1.5 and focal length 18 cm in air is immersed in water. The change in focal length of the lens…202324 January, Shift 2 · Q28