Assumptions and Sign conventions Object should be placed on the principal axis in the form of point object. All distances are measured from the pole of the mirror. The distances of the real object and real images are taken as positive whereas that of virtual objects and images are taken negative. Begin typing your search term above and press enter to search.
Press ESC to cancel. Why is that so? Isn't the image distance negative when an image is formed on the same side of the object? However, isn't that not the case. My understanding of the scenario is that the lens is in between the object and the image. With object on one side of lens and image on opposite. The corrective lens produces an image at the near point or further so that the person can see it.
In your question the object is at 24 cm but near point is 53 cm , So the person can see the image only if the object is at 53 cm or beyond, what the corrective lens does is that it produces an image Say I1 of the object which is at 24 cm at 53 cm or beyond ,This image I1 acts as the object for the eye, since the image formed by the corrective lens is on same side of object it is negative by sign convention.
Sign up to join this community. The best answers are voted up and rise to the top. Stack Overflow for Teams — Collaborate and share knowledge with a private group. It is a converging lens which means that the parallel rays coming from the source would converge at one point called the principal focus after passing through the lens. According to the Cartesian sign convention, the left and the bottom of origin point 0,0 would be negative. The right and top of the origin point 0,0 would be positive.
The radius of the curvature- Please think of lenses and mirrors as part of a circle. If we try to make a circle by joining the two ends of the convex lens or concave lens, the radius of curvature is nothing but the curvature of that circle. The smaller the lens, the smaller is the radius of curvature.
Please note that the light rays object distance comes from the left side and the image is formed on the right side of the lens as convex lens always converge. It makes focal length and image distance positive for the convex lens. The object distance is negative as it is on the left side of the lens. Get Started for Free Download App. More Optics Questions Q1. In a convex lens, when the object is placed at infinity, where is the image formed? Which of the following refrective defects of vision is also known as Far-sightedness?
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