Question

Question 13 5 pts A far-sighted person can see his iPhone clearly only if he holds it 40 cm away a farther from his eyes. What should be the prescription of his contact lenses, if he wants to clearly see his phone at a distance of 25 cm? O +1.5 D 0 -1.5 D 0 +6.5D O -6.5 D O -2.4D

Answer 1

here, we want the image to form when we place object at 25 cm

so,

1/f = 1/u + 1v

1/f = - 1/40 + 1/25

f = 66.66 cm

or

f = 0.6666 m

so,

P = 1/f

P = + 1.5