Search results
4 days ago · This condition is corrected using a convex lens where the light rays are focussed to the retina. Formula used: Lens formula: \[\dfrac{1}{f}=\dfrac{1}{v}-\dfrac{1}{u}\] Where f is the focal length of the lens, v is the image distance and u is the object distance. Complete step by step answer:
4 days ago · Convex lenses have positive focal length, so the power of a convex lens is also positive. A concave lens has a negative focal length, so the power of a concave lens is also negative. Formula Used: $\Rightarrow P = \dfrac{1}{f} $ $ P $ is the power of the lens in diameter and $ f $ is the focal length of the lens in meters. Complete step by step ...
5 days ago · Hint: The formula for calculating the focal lengths can be used here to find the correct answer for this problem. Also when we cut the lens horizontally the focal length does not change, the focal length of the lens changes when the lens is cut vertically.
4 days ago · A convex lens is placed in contact with a plane mirror. A point object at a distance of 20cm on the axis has its image coinciding with itself. What is the focal length of the lens?. Ans: Hint: A concave lens is a lens that has at least one curved sur...
4 days ago · These are collectively called optical devices. Real images can only be produced by a concave mirror and convex lens. Formula used: $\dfrac{1}{f} = \dfrac{1}{v} + \dfrac{1}{u}$ Complete step by step answer: In order to get the answer to the first part of the question, we can use the fact that the screen is placed on the same side of the sun.
May 29, 2024 · In mirror as well as optical lens problems, the most important thing to consider is sign conventions. Therefore, students should understand the sign conventions properly and then proceed with the solution. Diagrams are very helpful in understanding the sign conventions. Focal length of a convex lens is always taken positively.
5 days ago · Verified. 427.5k + views. Hint: The distance between the optical center and the principal focus of a spherical lens is known as the Focal length of a spherical lens. Formula used: 1 u + 1 v = 1 f 1 u + 1 v = 1 f. Complete step by step answer: A spherical lens is a type of lens whose surface has the shape of the surface of a sphere.
