Question

What is focal length ??

Good morning ☺️
Have a wonderful day ahead
Bye​

Answer 1

The focal length of an optical system is a measure of how strongly the system converges or diverges light; it is the inverse of the system's optical power. A positive focal length indicates that a system converges light, while a negative focal length indicates that the system diverges light. A system with a shorter focal length bends the rays more sharply, bringing them to a focus in a shorter distance or diverging them more quickly.

and very good morning dear...❤️

have a glorious day ✨✨

Answer 2

Answer:

ʜᴇʀᴇ ɪs ʏᴏᴜʀ ᴀɴsᴡᴇʀ ⬇️

Explanation:

ғᴏᴄᴀʟ ʟᴇɴɢᴛʜ ɪs ᴛʜᴇ ᴅɪsᴛᴀɴᴄᴇ ʙᴇᴛᴡᴇᴇɴ ᴛʜᴇ ᴄᴇɴᴛᴇʀ ᴏғ ᴀ ᴄᴏɴᴠᴇx ʟᴇɴs ᴏʀ ᴀ ᴄᴏɴᴄᴀᴠᴇ ᴍɪʀʀᴏʀ ᴀɴᴅ ᴛʜᴇ ғᴏᴄᴀʟ ᴘᴏɪɴᴛ ᴏғ ᴛʜᴇ ʟᴇɴs ᴏʀ ᴍɪʀʀᴏʀ ᴛʜᴇ ᴘᴏɪɴᴛ ᴡʜᴇʀᴇ ᴘᴀʀᴀʟʟᴇʟ ʀᴀʏs ᴏғ ʟɪɢʜᴛ ᴍᴇᴇᴛ, ᴏʀ ᴄᴏɴᴠᴇʀɢᴇ.