Question

Answer this fast Plz plz​

Answer 1

just take object distance as 64-32 becoz it is placed at a distance of 64 from white screen .....nd in d second line they gave us a hint that the convex lens is placed at a distance of 32 from d object...

so object distance will be -32

u=-32

and take image distance as 32 becoz the image is formed on d screen at a distance of 32 when u minus 64-32 we will get 32

we know that d lens formula is 1/f=1/v-1/u

substitute d values...

1/f= 1/32-1/-32

1/f=1/32+1/32

1/f=2/32

1/f=1/16

f=16

and magnification =h'/h=v/u

h'/2=32/-32

-32h=64

-h=64/32

-h=2

h=-2

hope this helps uh...nd pls mark me as brainliest if understood my solution...