When a fork is seen through lenses A and B one by one, it appears as shown in the diagrams. What is the nature of (i) lens A, and (ii) lens B? Give reason for your answer.
Download our app for free and get started
When the fork is seen through lens A, it appears to be diminished. Such diminished object is observed when it is placed near a concave lens. Therefore, lens A is concave, i.e., diverging in nature. When the fork is seen through lens B, it appears to be enlarged. Such enlarged image is formed by a convex lens when an object is placed between the lens and its focus. Therefore, lens B is a convex, i.e., converging in nature.
Download our appand get started for free
Experience the future of education. Simply download our apps or reach out to us for more information. Let's shape the future of learning together!No signup needed.*
Similar Questions
- 1View SolutionWhat do you understand by the power of a lens? Name one factor on which the power of a lens depends.
- 2View SolutionA doctor has prescribed a corrective lens of power +1.5 D. Find the focal length of the lens. Is the prescribed lens diverging or converging?
- 3View SolutionAn object of height 2.5cm is placed at a distance of 15cm from the optical centre ‘O' of a convex lens of focal length 10cm. Draw a ray diagram to find the position and size of the image formed. Mark optical centre ‘O', principal focus F and height of the image on the diagram.
- 4View SolutionDefine:
- Principal focus of a concave mirror.
- Focal length of a concave mirror.
- 5View SolutionWith the help of a diagram, show how when light falls obliquely on the side of a rectangular glass slab the emergent ray is parallel to the incident ray.
- 6View SolutionState and define the S.I. unit of power of a lens.
- 7View SolutionTo find the image distance for varying object distances in case of a convex lens of focal length 15 cm, a student obtains on a screen a sharp image of a bright object by placing it at 20 cm distance from the lens. After that he gradually moves the object away from the lens and each time focuses the image on the screen.
- In which direction-towards or away from the lens does he move the screen to focus the object?
- How does the size of image change?
- Approximately at what distance does he obtain the image of magnification -1?
- How does the intensity of image change as the object moves farther and farther away from the lens?
- 8View SolutionA doctor has prescribed a corrective lens of power, -1.5D. Find the focal length of the lens. Is the prescribed lens diverging or converging?
- 9View SolutionA concave mirror and a convex lens are held separately in water. What changes, if any, do you expect in the focal length of either?
- 10View SolutionHow will you distinguish between a plane mirror, a concave mirror and a convex mirror without touching them?