a convex lens of power 4d is placed at a distance of 40cm

power 4dDapatkan keputusan 4D & Jackpot yang paling cepat di Malaysia secara langsung dari Magnum 4D (m4d), Sports Toto (t4d), Damacai 1+3D (Kuda). Dato4D - 4D Predict King (4D88).Given, Power of convex lens=4D. Placed at 40 cm from a wall. To Find, Distance of a candle. Solution, It is given that ,Power = 4D. Then, P = 1f. So, 4 D = 1f