❤❤❤The focal length of a Convex Lens is 25 cm. At what distance from the optical centre of the lens an object be placed to obtain a virtual image of twice the size ?❤❤❤
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Magnifucation =) height of image/ height of object
=)2
v/u=2
v=2u
By lens formula...
1/f=1/v-1/u
1/f=1/2u-1/u
u=-f/2.
u=-25/2
u=(-12.5)
Negative sign show that image is in the front of the len
=)2
v/u=2
v=2u
By lens formula...
1/f=1/v-1/u
1/f=1/2u-1/u
u=-f/2.
u=-25/2
u=(-12.5)
Negative sign show that image is in the front of the len
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