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  • The power of a lens is +5 diopters. What is the nature and focal length of this lens ? At what distance from this lens should an object be placed so as to get its inverted image of the same size ?    <div style="float:left; w

The power of a lens is +5 diopters. What is the nature and focal length of this lens ? At what distance from this lens should an object be placed so as to get its inverted image of the same size ? 

 

 

 

 
 
 
 
 

Answers (2)

Power of a lens is (P) = +5D

focal length of lens (f) = \frac{1}{P}

f = \frac{1}{P}=0.20m = 20cm

Nature of lens = Convex (converging)

Distance from lens for inverted image of same size is 40cm (at C).

Posted by

Sumit Saini

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What is the nature of focal length

Posted by

Sahana

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