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CBSE Class 10 Answered

1.A lens  forms a real image 3 cm high of an object 1 cm high. If the separation of object and image is 15 cm , find the focal length of the lens?
 
2. A lens of focal length 20 cm is used to produce a ten times magnified image of a film slide on a screen. how far must the slide be placed from the lens?
Asked by yashpalguglani | 19 Nov, 2016, 02:49: PM
answered-by-expert Expert Answer
1. 
 
2. 
Answered by Yashvanti Jain | 21 Nov, 2016, 11:21: AM

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