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h=+3cm
h'=+6cm
v= -30cm(behind the lens ∴ negative)
u=?
h'/h=v/u
u=h×v/h'
=3× -30/6
= -15cm
1/f=1/v - 1/u
=1/-30 - 1/-15
=1/15 - 1/30
=2/30 - 1/30
=1/30
f = 30cm=30/100 m=0.3 m
P=1/f
=1/0.3
=10/3
=3.34 D
h'=+6cm
v= -30cm(behind the lens ∴ negative)
u=?
h'/h=v/u
u=h×v/h'
=3× -30/6
= -15cm
1/f=1/v - 1/u
=1/-30 - 1/-15
=1/15 - 1/30
=2/30 - 1/30
=1/30
f = 30cm=30/100 m=0.3 m
P=1/f
=1/0.3
=10/3
=3.34 D
adithya02:
Wrong
f=10cm
can u please tell me the mistake
but how
sorry it was correct
it's ok
thank u for thanking
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