Solve this: Q 43 The least distance of vision of a longsighted person is 60 cm By using - Physics - Ray Optics And Optical Instruments

Question

Solve this:
Q 43 The least distance of vision of a longsighted person is 60 cm
By using a spectacle lens, this distance is reduced to 12 cm The
power of the lens is
(a) + 5 0 D
(b) + (20/3) D
(c) - (10/3) D
(d) + 2 0 D

Vipra Mishra · Accepted Answer

Dear Student

v=-60 cmu =-12 cm1f=1v-1u=-160+112=-1+560=+460f =+15 cm =0
15mP=1f=10 15=10015=203D
Regards

Solve this: Q.43. The least distance of vision of a longsighted person is 60 cm. By using a spectacle lens, this distance is reduced to 12 cm. The power of the lens is (a) + 5.0 D (b) + (20/3) D (c) - (10/3) D (d) + 2.0 D

Solve this:
Q.43. The least distance of vision of a longsighted person is 60 cm. By using a spectacle lens, this distance is reduced to 12 cm. The power of the lens is
(a) + 5.0 D
(b) + (20/3) D
(c) - (10/3) D
(d) + 2.0 D