This is Mur 
@freemo
You copied this from a physics textbook? 
🇳🇱
@mur2501 if you find a text book that actually laid out each of the fields on the screencap one by one and explained them, sure... I dont know of one.
@freemo
Not really 
Though the Indian junior college Physics textbook do covers the radiation element and other stuffs
@freemo
I think copy pasting a textbook would have been a better choice for saving time