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1Nitishdpsrewari
Secondary SchoolPhysics 5+3 pts
A teacher gives a convex lens and a concave mirror of foal length 20 cm each to his student and asks him to find their focal length by obtaining the image of a distant object. The student uses a distant tree as the object and obtains it's sharp image,one by one,on a screen. The distances d1 and d2 between the lens/mirror and the screen in the two cases and the nature of their respective sharp images are likely to be.
A) [20cm,40cm] and [erect and erect]
B)[20cm,40cm ] and [inverted and inverted]
C)[20cm,20cm] and [inverted and inverted]
D) [20cm,40cm] and [erect and inverted]
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Answer is c
Both will be inverted and same size
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