♠️...HELLO...♠️
Important question Class 10 Science -
● Why magnification is taken negative for real images and positive for virtual images?
Answers
Answer: Magnification is the ratio between the height of the object and the height of the image.
In the case of a real image, the height of the object carries a positive sign while the height of the image carries a negative one.
Hence the magnification is negative.
In case of a virtual image, the height of the image, as well as the height of the object, carries a positive sign.
Therefore, the magnification is positive in this case.
CREDITS FOR THIS ANSWER GO TO ARSLANKINCSEM
Heyᴀ......❤
ᴍᴀɢɴɪғɪᴄᴀᴛɪᴏɴ ғᴏʀ ᴍɪʀʀᴏʀs ɪs ɢɪᴠᴇɴ ᴀs
ᴍ = - ᴠ / ᴜ
ɪғ ɪᴍᴀɢᴇ ɪs ʀᴇᴀʟ, ɪᴛ ᴍᴇᴀɴs ɪᴛ ᴡɪʟʟ ʙᴇ ɪɴᴠᴇʀᴛᴇᴅ ɪ.ᴇ. ʜᴇɪɢʜᴛ ᴏғ ɪᴍᴀɢᴇ ᴡɪʟʟ ʙᴇ ᴛᴀᴋᴇɴ ᴀs ɴᴇɢᴀᴛɪᴠᴇ. ᴀʟsᴏ, ᴛʜᴇ ʜᴇɪɢʜᴛ ᴏғ ᴏʙᴊᴇᴄᴛ ɪs ᴀʟᴡᴀʏs ᴘᴏsɪᴛɪᴠᴇ.
ᴀs ᴍᴀɢɴɪғɪᴄᴀᴛɪᴏɴ ɪs ʜᴇɪɢʜᴛ ᴏғ ɪᴍᴀɢᴇ / ʜᴇɪɢʜᴛ ᴏғ ᴏʙᴊᴇᴄᴛ ɪᴛ ᴡɪʟʟ ʙᴇ ɴᴇɢᴀᴛɪᴠᴇ
sɪɴᴄᴇ,
ᴍᴀɢɴɪғɪᴄᴀᴛɪᴏɴ = ʜᴇɪɢʜᴛ ᴏғ ɪᴍᴀɢᴇ (-) / ʜᴇɪɢʜᴛ ᴏғ ᴏʙᴊᴇᴄᴛ (+)= ɴᴇɢᴀᴛɪᴠᴇ.
sᴏ, ᴍᴀɢɴɪғɪᴄᴀᴛɪᴏɴ ᴡɪʟʟ ʙᴇ ɴᴇɢᴀᴛɪᴠᴇ.
sɪᴍɪʟᴀʀʟʏ, ɪғ ɪᴍᴀɢᴇ ɪs ᴠɪʀᴛᴜᴀʟ ɪ.ᴇ. ɪᴛ ɪs ᴇʀᴇᴄᴛ.
ᴍᴀɢɴɪғɪᴄᴀᴛɪᴏɴ = ʜᴇɪɢʜᴛ ᴏғ ɪᴍᴀɢᴇ (+) / ʜᴇɪɢʜᴛ ᴏғ ᴏʙᴊᴇᴄᴛ (+)= ᴘᴏsɪᴛɪᴠᴇ .