Question

the question in attachments....​

Answer 1

ANS :

Refer to the attachment.

EXPLANATION :

◆ The person suffer from miopia and it's far point is 80 cm.So, we get

u = infinity and v = - 80 cm.

◆ [NOTE –> Infinity = 0]

◆ Now, by using lens formula and putting the value of 'u' and 'v' we get the focal length.

1/f = 1/v - 1/u. [ ---> lens formula ]

◆ So, the focal length we got is - 80cm.

◆ Now , by using lens formula we can find the power.

P = 1/f.

◆ So, we get the power as -1.25 D.

ANSWER => -1.25D

Answer 2

❥AnSwER....

Refer to the attachment above...