Question

ᴀɴꜱᴡᴇʀ ᴛʜᴇ Qᴜᴇꜱᴛɪᴏɴ ɢɪᴠᴇɴ ɪɴ ᴛʜᴇ ᴀᴛᴛᴀᴄʜᴍᴇɴᴛ

only (b) part​

Answer 1

Answer:

(b) Focal length, f = -5 m

P= 1/ f (m)

P = 1 / -5 = - 0.2D

Hence, the power is - 0.2D.

Answer 2

Power of a lens is

P=1/f

=1/5

=0.2D