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According to formula
p = 1/f
2 = 1/f
hence f=1/2 => f=0.5 ans 
0 0 0
Power formula
By substituting value of P in the formula
2.0=100/f.… ( when f is in cm)
Hence the focal length of the lens whose power is 2.0D is 50cm or 0.5m.
2 5 2
pls mark my answer brainliest
yes, I agree with him, tou must covert it to cms first.
*you, not tou
then pls thank me
oh, ok. ^_^
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