When the sun moves the plant moves its leaves so it can get the most sun on its leaves
So if the sun is suddenly on the west and all your leaves are towards the sun and all of a sudden the sun goes behind you, you want to get all the sun onto your leaves as you can so you move.
Idk if that made since, but the gist is the plant wants the most sun on each leave as possible so it will move its leaves to face the sun
Btw the sun is your lights
I understand what you're saying here, and NO disrespect because this is all based on my and opinion and logic, but for everyone growing indoors, this is pretty much invalid!! Indoor lights are about as bright as a sun's solar fart.
Growing outdoors under the real sun is different because the sun has ridiculous light penetration it's very potent. Also, this point it pretty much contradictory because THE SUN ROTATES IN THE SKY. Last time I checked, the sun rises in the East, and sets in the west... Isn't that the same exact thing as rotating your plants?
Granted, the sun uses the same path in the atmosphere when rotating the earth, but when I think about this, it's literally the same.
Think of it this way... In the early hours of the morning, when the sun is on the horizon, it comes up on the east. The plant immediately responds by pointing itself the the east to capture the sun's rays as it rises. As the hours go by and the sun is following the east-to-west path, the plant follows the same path throughout the day to maximize it's intake of energy. I haven't honestly watched a plant grow during the day so I'm not sure if this is completely true, but I do know the basic principles of nature. Notice if you put a plant under a tree, or some kind of shade (over the top of the plant), the plant will start growing side-ways to get out of the shade so it can get as many hours of direct light as possible. As it grows sideways, the tops also start to point in the sun's directing, making it look like some kind of LST stunt.
Sorry if I stepped on toes here, it's just my 2 cents.
