Heyyyyaaa guyzzzz... answer atleast any one among 2 . 1 answer = 1 brainliest + 3 thanks . 2 ans = brainliest + 5 thanks +follow But correct step also needed. inappropriate will be reported at the spot
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And 12 is 4) 6.67 D
D = (u-1)(1/R^1-1/R^2)
= (u-1) x k
10=(1.5-1) x k
k= 10/0.5= 20
D = (4/3 -1 ) x k
=1/3 x 20
= 20/3 = 6.67 D
u is the symbol which is equal to 4/3.
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