Question

how is magnification determined for spherical mirrors​

Answer 1

Answer:

Here, h is the height of image and h' is the height of the object. Magnification is also equal to the ratio of image distance to the object distance. As the object is always above the principal axis, the height of the object is always positive.

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Answer 2

ᴛʜᴇ ᴍᴀɢɴɪꜰɪᴄᴀᴛɪᴏɴ, ᴍ, ɪꜱ ᴅᴇꜰɪɴᴇᴅ ᴀꜱ ᴛʜᴇ ʀᴀᴛɪᴏ ᴏꜰ ᴛʜᴇ ɪᴍᴀɢᴇ ʜᴇɪɢʜᴛ ᴛᴏ ᴛʜᴇ ᴏʙᴊᴇᴄᴛ ʜᴇɪɢʜᴛ, ᴡʜɪᴄʜ ɪꜱ ᴄʟᴏꜱᴇʟʏ ʀᴇʟᴀᴛᴇᴅ ᴛᴏ ᴛʜᴇ ʀᴀᴛɪᴏ ᴏꜰ ᴛʜᴇ ɪᴍᴀɢᴇ ᴅɪꜱᴛᴀɴᴄᴇ ᴛᴏ ᴛʜᴇ ᴏʙᴊᴇᴄᴛ ᴅɪꜱᴛᴀɴᴄᴇ: ᴀ ᴍᴀɢɴɪꜰɪᴄᴀᴛɪᴏɴ ᴏꜰ 1 (ᴘʟᴜꜱ ᴏʀ ᴍɪɴᴜꜱ) ᴍᴇᴀɴꜱ ᴛʜᴀᴛ ᴛʜᴇ ɪᴍᴀɢᴇ ɪꜱ ᴛʜᴇ ꜱᴀᴍᴇ ꜱɪᴢᴇ ᴀꜱ ᴛʜᴇ ᴏʙᴊᴇᴄᴛ.

ʜᴏᴘᴇ ɪᴛ ʜᴇʟᴘꜱ !!