The power of the lens is negative 2.5
d. what is the focal length and nature of lens
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Hello,
since the power is negative the lens is diverging(concave).
and you can find focal length by:
P=1/(f in m)
-2.5=1/f
f=-1/2.5
f=-0.4m
or
f=-40cm.
Hope that helps.
keep learning.
since the power is negative the lens is diverging(concave).
and you can find focal length by:
P=1/(f in m)
-2.5=1/f
f=-1/2.5
f=-0.4m
or
f=-40cm.
Hope that helps.
keep learning.
Anonymous:
any doubt in this question?
Fine. bye.
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