Question

object appear to be snaking above fire​

Answer 1

Answer: refraction of light

Explanation:

If we look at objects through the hot air over a fire, they appear to be moving or shaking slightly because of the refraction of light. When the air just above the fire gets heated up, it becomes optically rarer than the colder air further above the fire, which is optically denser

Answer 2

Answer:

ʀᴇғʀᴀᴄᴛɪᴏɴ ᴏғ ʟɪɢʜᴛ

Explanation:

ɪғ ᴡᴇ ʟᴏᴏᴋ ᴀᴛ ᴏʙᴊᴇᴄᴛs ᴛʜʀᴏᴜɢʜ ᴛʜᴇ ʜᴏᴛ ᴀɪʀ ᴏᴠᴇʀ ᴀ ғɪʀᴇ, ᴛʜᴇʏ ᴀᴘᴘᴇᴀʀ ᴛᴏ ʙᴇ ᴍᴏᴠɪɴɢ ᴏʀ sʜᴀᴋɪɴɢ sʟɪɢʜᴛʟʏ ʙᴇᴄᴀᴜsᴇ ᴏғ ᴛʜᴇ ʀᴇғʀᴀᴄᴛɪᴏɴ ᴏғ ʟɪɢʜᴛ. ᴡʜᴇɴ ᴛʜᴇ ᴀɪʀ ᴊᴜsᴛ ᴀʙᴏᴠᴇ ᴛʜᴇ ғɪʀᴇ ɢᴇᴛs ʜᴇᴀᴛᴇᴅ ᴜᴘ, ɪᴛ ʙᴇᴄᴏᴍᴇs ᴏᴘᴛɪᴄᴀʟʟʏ ʀᴀʀᴇʀ ᴛʜᴀɴ ᴛʜᴇ ᴄᴏʟᴅᴇʀ ᴀɪʀ ғᴜʀᴛʜᴇʀ ᴀʙᴏᴠᴇ ᴛʜᴇ ғɪʀᴇ, ᴡʜɪᴄʜ ɪs ᴏᴘᴛɪᴄᴀʟʟʏ ᴅᴇɴsᴇʀ.