3) What is power of lens?
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❤ᴘᴏᴡᴇʀ ᴏғ ʟᴇɴs ɪs ᴛʜᴇ ᴀʙɪʟɪᴛʏ ᴏғ ᴛʜᴇ ʟᴇɴs ᴛᴏ ᴄᴏɴᴠᴇʀɢᴇ ᴛʜᴇ ʀᴀʏs ᴏғ ʟɪɢʜᴛ ғᴀʟʟɪɴɢ ᴏɴ ɪᴛ. ɪᴛ ᴄᴀɴ ᴀʟsᴏ ʙᴇ ᴅᴇғɪɴᴇᴅ ᴀs ᴘ=1/ғ ᴡʜᴇʀᴇ ғ ɪs ᴛʜᴇ ғᴏᴄᴀʟ ʟᴇɴɢᴛʜ. ... ᴏɴᴇ ᴅɪᴏᴘᴛʀᴇ ɪs ᴛʜᴇ ᴘᴏᴡᴇʀ ᴏғ ᴀ ʟᴇɴs ᴡʜᴏsᴇ ғᴏᴄᴀʟ ʟᴇɴɢᴛʜ ɪs 1 ᴍᴇᴛʀᴇ. ᴄᴏɴᴠᴇx ʟᴇɴs ʜᴀs ᴘᴏsɪᴛɪᴠᴇ ᴘᴏᴡᴇʀ ᴡʜɪʟᴇ ᴄᴏɴᴄᴀᴠᴇ ʟᴇɴs ʜᴀs ɴᴇɢᴀᴛɪᴠᴇ ᴘᴏᴡᴇʀ.❤
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The power of a lens is defined as the reciprocal of its focal length in meters, or D = 1/f, where D is the power in diopters and f is the focal length in meters. • A lens with a focal length of two meters has a power of one-half diopter because the reciprocal
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