Question

The far point of a myopic eye is 50 cm.what is the nature and power of the corrective lens required.

Answer 1

Answer:

nature of lens =concave lens

v=50 in concave lens v is always negative

u=infinity which is treated as zero

formula

1/f=1/v-1/u

1/f=1/-50-1/0

1/f=1/-50

f=-50

now for power

power=1/f

power=1/-50=-0.02D