hey solve this please and attach solution also
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magnification is =v/u-------------(1)
1/f=(1/v)+(1/u)-----------(2)
then we have to find first u
then
M=v/u
3=40/u
u=40/3(substitute this value in equation 2)
then the answer is
10 cm buddy
if it helped you plz mark me brainliest
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Pl see attachment
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tq so much
for lens, v/u = m
v = -3u, u = -20, v = 60
what is the meaning of u=-20 and the distance between object and image is 40 cm,how you will explain
sir why have you written v= -mu
BECAUSE IMAGE IS INVERTED (ULTI)
ohhhhh
This answer is wrong. The answerer does not understand how to use negative sign in magnification properly.
i suggest you do it on your own. use the formula v/u = m and m= -3 in this case
you will get u= -20 and v= 60. Then you can find the f
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