Question

Two lens of power +2•50D and -3•75D are combined to form a compound lens. What is the focal length?​

Answer 1

Hey dudes.

 here is your answer .

   Power of 1st lens=+2.50D

   Power of 2nd lens = -3.75 D

 total power of the lens = +2.50 -3.75

                                        = - 1.25 D

    focal lenght of the new lens = 1/p

                                                    =(1/-1.25 ) m

                                                  =  -0.8 m

                                                  =-80cm  

                                                 

Answer 2

Answer:

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which symbol will suit da macha..

nee panni..tharen..nu sonne..aana..aaleye..kaano..

select from this