Question

What is the sign convention for convex lense​

Answer 1

Answer:

For the convex lens, lies in the positive quadrant whereas, in case on concave lens the focus of the second surface lies to the right which is in the negative quadrant. Hence, the sign convention is negative.

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Answer 2

Fᴏʀ ᴛʜᴇ ᴄᴏɴᴠᴇx ʟᴇɴs, ʟɪᴇs ɪɴ ᴛʜᴇ ᴘᴏsɪᴛɪᴠᴇ ϙᴜᴀᴅʀᴀɴᴛ ᴡʜᴇʀᴇᴀs, ɪɴ ᴄᴀsᴇ ᴏɴ ᴄᴏɴᴄᴀᴠᴇ ʟᴇɴs ᴛʜᴇ ғᴏᴄᴜs ᴏғ ᴛʜᴇ sᴇᴄᴏɴᴅ sᴜʀғᴀᴄᴇ ʟɪᴇs ᴛᴏ ᴛʜᴇ ʀɪɢʜᴛ ᴡʜɪᴄʜ ɪs ɪɴ ᴛʜᴇ ɴᴇɢᴀᴛɪᴠᴇ ϙᴜᴀᴅʀᴀɴᴛ. Hᴇɴᴄᴇ, ᴛʜᴇ sɪɢɴ ᴄᴏɴᴠᴇɴᴛɪᴏɴ ɪs ɴᴇɢᴀᴛɪᴠᴇ.

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