Question

ᴇxᴘʟᴀɪɴ ᴘᴇʀᴍᴇᴀʙɪʟɪᴛʏ ᴏғ ғʀᴇᴇ sᴘᴀᴄᴇ.
ᴘʟᴇᴀsᴇ ɢɪᴠᴇ ᴀɴ ᴇᴀsʏ ᴀɴᴅ ᴅᴇᴛᴀɪʟᴇᴅ ɪɴғᴏʀᴍᴀᴛɪᴏɴ.

ɪ ᴀᴍ ᴡᴀsᴛɪɴɢ ᴍʏ sᴏ ᴍᴀɴʏ ᴘᴏɪɴᴛs ᴏɴ ᴛʜɪs ǫᴜᴇsᴛɪᴏɴ, sᴏ ᴘʟᴇᴀsᴇ ɢɪᴠᴇ ᴘʀᴏᴘᴇʀ ᴀɴsᴡᴇʀ :(​

Answer 1

The permeability of free space, μ0, is a physical constant used often in electromagnetism. It is defined to have the exact value of 4π x 10-7 N/A2 (newtons per ampere squared). It is connected to the energy stored in a magnetic field, see Hyperphysics for specific equations.

Answer 2

Explanation:

ᴛʜᴇ ᴘᴇʀᴍᴇᴀʙɪʟɪᴛʏ ᴏғ ғʀᴇᴇ sᴘᴀᴄᴇ, μ, ɪs ᴀ ᴘʜʏsɪᴄᴀʟ ᴄᴏɴsᴛᴀɴᴛ ᴜsᴇᴅ ᴏғᴛᴇɴ ɪɴ ᴇʟᴇᴄᴛʀᴏᴍᴀɢɴᴇᴛɪsᴍ. ɪᴛ ɪs ᴅᴇғɪɴᴇᴅ ᴛᴏ ʜᴀᴠᴇ ᴛʜᴇ ᴇxᴀᴄᴛ ᴠᴀʟᴜᴇ ᴏғ π x - ɴ/ᴀ (ɴᴇᴡᴛᴏɴs ᴘᴇʀ ᴀᴍᴘᴇʀᴇ sǫᴜᴀʀᴇᴅ). ɪᴛ ɪs ᴄᴏɴɴᴇᴄᴛᴇᴅ ᴛᴏ ᴛʜᴇ ᴇɴᴇʀɢʏ sᴛᴏʀᴇᴅ ɪɴ ᴀ ᴍᴀɢɴᴇᴛɪᴄ ғɪᴇʟᴅ, sᴇᴇ ʜʏᴘᴇʀᴘʜʏsɪᴄs ғᴏʀ sᴘᴇᴄɪғɪᴄ ᴇǫᴜᴀᴛɪᴏɴs.