Power and Combination of Lenses
JEE Main Physics · Ray Optics · 16 questions, latest first
- A thin convex lens and a thin concave lens are kept in contact and are co-axial. Which of the following statements is correct for…20265 April, Shift 2 · Q40
- An object A B is placed 15 cm on the left of a convex lens P of focal length 10 cm. Another convex lens Q is now placed 15 cm…20265 April, Shift 2 · Q41
- A biconvex lens is formed by using two thin planoconvex lenses, as shown in the figure. The refractive index and radius of curved…202628 January, Shift 2 · Q42
- A thin convex lens of focal length 5 cm and a thin concave lens of focal length 4 cm are combined together (without any gap) and…202622 January, Shift 1 · Q41
- A collimated beam of light of diameter 2 mm is propagating along x -axis. The beam is required to be expanded in a collimated…202621 January, Shift 1 · Q47
- A concave-convex lens of refractive index 1.5 and the radii of curvature of its surfaces are 30 cm and 20 cm, respectively. The…20258 April, Shift 2 · Q41
- A convex lens of focal length 30 cm is placed in contact with a concave lens of focal length 20 cm. An object is placed at 20 cm…20258 April, Shift 2 · Q43
- Two thin convex lenses of focal lengths 30 cm and 10 cm are placed coaxially, 10 cm apart. The power of this combination is:20257 April, Shift 1 · Q27
- What is the relative decrease in focal length of a lens for an increase in optical power by 0.1 D from 2.5D? ['D' stands for…202524 January, Shift 1 · Q41
- In the diagram given below, there are three lenses formed. Considering negligible thickness of each of them as compared to |R_1|…202522 January, Shift 1 · Q42
- The following figure represents two biconvex lenses L_1 and L_2 having focal length 10 cm and 15 cm respectively. The distance…20249 April, Shift 2 · Q46
- The position of the image formed by the combination of lenses is:20248 April, Shift 2 · Q45
- An effective power of a combination of 5 identical convex lenses which are kept in contact along the principal axis is 25 D.…20244 April, Shift 1 · Q45
- Two convex lenses of focal length 20 cm each are placed coaxially with a separation of 60 cm between them. The image of the…202312 April, Shift 1 · Q59
- A point object, ' O ' is placed in front of two thin symmetrical coaxial convex lenses L_1 and L_2 with focal length 24 cm and 9…202310 April, Shift 2 · Q57
- As shown in the figure, a combination of a thin plano concave lens and a thin plano convex lens is used to image an object placed…202324 January, Shift 1 · Q27