Question

FIND THE POWER OF CONCAVE LENS OF FOCAL LENGTH 2m​

Answer 1

Explanation:

1. power of lens is equal to resiprocal of foca length
2. d=1/f
3. d=1/2
4. d=o.5 diopeter

Answer 2

ғᴏᴄᴀʟ ʟᴇɴɢᴛʜ ɪs ɢɪᴠᴇɴ ᴛɢᴀ 2 ᴍ

ᴘᴏᴡᴇʀ ᴏғ ʟᴇɴs ᴘ = 1/ғ

ᴘ = 1 / -2 ( ᴠ sʜᴅ ᴀʟᴡᴀʏs ᴛᴀᴋᴇ ɪᴛ ɴᴇɢᴀᴛɪᴠᴇ)

ᴘ = -0.5 ᴅ