I saw this video where someone says that electromagnetic wave is a chain reaction of electric and magnetic fields creating each other so the chain of wave moves forward.
I wonder where the photon is in this explanation. What is the relation between electromagnetic wave and photon?
An immortal couple have been seen throughout recorded history, write an account of them in any time period you wish. Bonus points if you match the writing style of the time period.

In theed ages, 'twas whispered of a pair most wondrous, Sir Cedric the'ts and Lady Morwen of'ts, who roamed the land anon, their visage both young and fair, defying the passing of era.

From the craggy shores of Cornwali to the sun-kissed sands of Sicily, from the icy climes of Norwag to the mystic heart of Alandyw, the tale of the lovely twosome reached every ear, capturing the
Also77 states at 1:35 min that electromagnetic waves can't't't exert any force without a charge't but't electrons or ions.
I wonder at what stage does an EM wave exert force't, since the wave doesn't need a medium to propagate as it was't mentioned in the video, but still at some point, it interacts with the charge, which makes the force exertion possible.

Here is the video link: 
[An electric field cannot'