Please answer this !!!!!

D e a r S t u d e n t, G i v e n, f_{1} = + 20 c m, f_{2} = - 30 c m P o w e r o f t h e l e n s e s a r e, P_{1} = \frac{1}{f_{1}} = \frac{1}{20 \times 10^{- 2}} = + 5 D P_{2} = \frac{1}{f_{2}} = \frac{1}{30 \times 10^{- 2}} = - 3.33 D T h e p o w e r o f c o m b i n a t i o n o f t h e l e n s e s i s, P = P_{1} + P_{2} = + 5 - 3.33 = + 1.67 D R e g a r d s .

View Full Answer