Question

What is light? Write the speed of light also.​

Answer 1

Explanation:

Light or visible light is electromagnetic radiation within the portion of the electromagnetic spectrum that can be perceived by the human eye.

speed of light:

The speed of light is measured to have the same value of c = 3x108 m/s no matter who measures it.

Answer 2

ʟɪɢʜᴛ ɪs ᴀ ғᴏʀᴍ ᴏғ ᴇʟᴇᴄᴛʀᴏᴍᴀɢɴᴇᴛɪᴄ ʀᴀᴅɪᴀᴛɪᴏɴ ᴡɪᴛʜ ᴀ ᴡᴀᴠᴇʟᴇɴɢᴛʜ ᴡʜɪᴄʜ ᴄᴀɴ ʙᴇ ᴅᴇᴛᴇᴄᴛᴇᴅ ʙʏ ᴛʜᴇ ʜᴜᴍᴀɴ ᴇʏᴇ. ɪᴛ ɪs ᴀ sᴍᴀʟʟ ᴘᴀʀᴛ ᴏғ ᴛʜᴇ ᴇʟᴇᴄᴛʀᴏᴍᴀɢɴᴇᴛɪᴄ sᴘᴇᴄᴛʀᴜᴍ ᴀɴᴅ ʀᴀᴅɪᴀᴛɪᴏɴ ɢɪᴠᴇɴ ᴏғғ ʙʏ sᴛᴀʀs ʟɪᴋᴇ ᴛʜᴇ sᴜɴ.ʟɪɢʜᴛ ᴇxɪsᴛs ɪɴ ᴛɪɴʏ ᴇɴᴇʀɢʏ ᴘᴀᴄᴋᴇᴛs ᴄᴀʟʟᴇᴅ ᴘʜᴏᴛᴏɴs. ᴇᴀᴄʜ ᴡᴀᴠᴇ ʜᴀs ᴀ ᴡᴀᴠᴇʟᴇɴɢᴛʜ ᴏʀ ғʀᴇϙᴜᴇɴᴄʏ.

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ᴛʜᴇ sᴘᴇᴇᴅ ᴏғ ʟɪɢʜᴛ ɪɴ ᴀ ᴠᴀᴄᴜᴜᴍ ɪs 186,282 ᴍɪʟᴇs ᴘᴇʀ sᴇᴄᴏɴᴅ (299,792 ᴋɪʟᴏᴍᴇᴛᴇʀs ᴘᴇʀ sᴇᴄᴏɴᴅ), ᴀɴᴅ ɪɴ ᴛʜᴇᴏʀʏ ɴᴏᴛʜɪɴɢ ᴄᴀɴ ᴛʀᴀᴠᴇʟ ғᴀsᴛᴇʀ ᴛʜᴀɴ ʟɪɢʜᴛ. ɪɴ ᴍɪʟᴇs ᴘᴇʀ ʜᴏᴜʀ, ʟɪɢʜᴛ sᴘᴇᴇᴅ ɪs, ᴡᴇʟʟ, ᴀ ʟᴏᴛ: ᴀʙᴏᴜᴛ 670,616,629 ᴍᴘʜ. ɪғ ʏᴏᴜ ᴄᴏᴜʟᴅ ᴛʀᴀᴠᴇʟ ᴀᴛ ᴛʜᴇ sᴘᴇᴇᴅ ᴏғ ʟɪɢʜᴛ, ʏᴏᴜ ᴄᴏᴜʟᴅ ɢᴏ ᴀʀᴏᴜɴᴅ ᴛʜᴇ ᴇᴀʀᴛʜ 7.5 ᴛɪᴍᴇs ɪɴ ᴏɴᴇ sᴇᴄᴏɴᴅ.