what are lenses? explain the sperical mirror
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ᴀ ʟᴇɴs ɪs ᴀ ᴛʀᴀɴsᴍɪssɪᴠᴇ ᴏᴘᴛɪᴄᴀʟ ᴅᴇᴠɪᴄᴇ ᴛʜᴀᴛ ғᴏᴄᴜsᴇs ᴏʀ ᴅɪsᴘᴇʀsᴇs ᴀ ʟɪɢʜᴛ ʙᴇᴀᴍ ʙʏ ᴍᴇᴀɴs ᴏғ ʀᴇғʀᴀᴄᴛɪᴏɴ. ᴀ sɪᴍᴘʟᴇ ʟᴇɴs ᴄᴏɴsɪsᴛs ᴏғ ᴀ sɪɴɢʟᴇ ᴘɪᴇᴄᴇ ᴏғ ᴛʀᴀɴsᴘᴀʀᴇɴᴛ ᴍᴀᴛᴇʀɪᴀʟ, ᴡʜɪʟᴇ ᴀ ᴄᴏᴍᴘᴏᴜɴᴅ ʟᴇɴs ᴄᴏɴsɪsᴛs ᴏғ sᴇᴠᴇʀᴀʟ sɪᴍᴘʟᴇ ʟᴇɴsᴇs, ᴜsᴜᴀʟʟʏ ᴀʀʀᴀɴɢᴇᴅ ᴀʟᴏɴɢ ᴀ ᴄᴏᴍᴍᴏɴ ᴀxɪs.
SPERICAL MIRROR : ᴀ ᴍɪʀʀᴏʀ ᴡɪᴛʜ ᴀ sᴜʀғᴀᴄᴇ ᴛʜᴀᴛ ɪs ᴇɪᴛʜᴇʀ ᴄᴏɴᴄᴀᴠᴇ ᴏʀ ᴄᴏɴᴠᴇx ᴀɴᴅ ғᴏʀᴍs ᴀ ᴘᴏʀᴛɪᴏɴ ᴏғ ᴀ ᴛʀᴜᴇ sᴘʜᴇʀᴇ
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a mirror with a surface that is either concave or convex and forms a portion of a true sphere.
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