A doctor has prescribed a corrective lens of power + 1.5 D. Find the focal length of the lens. is the prescribed lens diverging or converging?
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ʜᴇʀᴇ ɪs ᴜʀ ᴀɴsᴡᴇʀ:-⏬⏬
ᴘᴏᴡᴇʀ ᴏғ ᴛʜᴇ ʟᴇɴs= +1.5ᴅ
ᴜsɪɴɢ ᴘ=100/ғ
ғ=100/ғ
ғ=100/1.5
=1000/15= 66.67ᴍ
ᴀs ᴛʜᴇ ғᴏᴄᴀʟ ʟᴇɴɢᴛʜ ɪs ᴘᴏsɪᴛɪᴠᴇ, ɪᴛ ɪs ᴄᴏɴᴠᴇx ʟᴇɴs.
ʜᴇɴᴄᴇ, ɪᴛ ɪs ᴀ ᴄᴏɴᴠᴇʀɢɪɴɢ ʟᴇɴs.
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