If a convex lens has power of 5 d then find it's focal length
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p= +5 dioptre ( convex lens)
p=1/f (in metres)
5=1/f
therefore by cross multiplication,
f=1/5 metre
f=0.2 metre or 20 cm
I think it will help you.
p=1/f (in metres)
5=1/f
therefore by cross multiplication,
f=1/5 metre
f=0.2 metre or 20 cm
I think it will help you.
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