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CBSE Class 10 Answered

What do you mean by linear magnification produced by mirrors? The power of a lens is +2.5D. What kind of lens is it and what is its focal length? 
Draw a ray diagram of an image when an object is placed on the principal axis of a convex lens between focus and optical centre. 
Asked by pdcavita | 20 Dec, 2017, 05:53: PM
answered-by-expert Expert Answer
Power = 1 / focal length in meter
 
focal length= 1/+2.5 = + 4 m
 
A convex lens has positive focal length.
 
Only one question can be answered at a time.
 
 
 
Answered by Gajendra | 20 Dec, 2017, 07:01: PM
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