Question

a concave lens has its focal length 20 cm and object is at 15 cm find position of age and find its magnification.​

Answer 1

Answer:

V=-12cm

m=12/15 (or) 0.8

Step-by-step explanation:

f=-20

u=-15

to find--

v-?

m=?

W.K.T,

1/f=1/v-1u

1/V=1/F+1/U

-1/20 +(-1/15)

-1/20-1/15=1/V

cross multiply ....

-15-10/300

1/V=-25/300

1/V=-1/12

V=-12

to find magnification. .

W.K.T..

m=V/U

m=-12/-15

minus will be cancelled .

m=12/15 or 0.8

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Answer 2

Answer:

i hope it helped u please comment me if something goes wrong