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If the distance between object and its two times magnified virtual image produced by a curved mirror is 15 cm, the focal length of the mirror must
be :
(1) 15 cm 2) –12 cm. 3) –10 cm 4) 10/3 cm
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Frequently Asked Questions
How to prepare for IIT-JEE Physics?
To prepare for IIT-JEE Physics, focus on understanding concepts rather than memorizing formulas. Practice solving a variety of problems, especially previous years’ questions. Create a study schedule that covers all topics, with extra time for challenging areas like Mechanics and Electromagnetism. Regular revision and mock tests are essential for success.
How do lenses form images?
Lenses form images by refracting light rays. Convex (converging) lenses can form both real and virtual images depending on the object distance. Concave (diverging) lenses always form virtual, upright, and diminished images. The lens equation (1/f = 1/v + 1/u) relates the focal length (f), image distance (v), and object distance (u).
How to effectively solve physics numerical problems?
To solve physics numerical problems effectively, first understand the concept thoroughly. Then follow these steps: 1) Read the problem carefully and identify the given quantities and what needs to be found. 2) Draw a diagram if applicable. 3) Write down the relevant formulas. 4) Substitute the values with proper units. 5) Solve step by step. 6) Verify your answer by checking units and whether the result makes physical sense.