How does data synchronization work between nodes in a blockchain?

Question

blockchain

Suppose if a 51% attack occurs in order to change the 95th block, they will need to change the blocks from 95 to the current block that has not yet been found and post all the changes at once, and as I understand it, the system will synchronize everything itself, because with a successful 51% attack, the miners will not know that something is wrong. If this is done by one person, one node, which has 51% of the capacity, and there are, for example, ten nodes in the network. Then why should his changes be accepted if the rest of the devices have the correct information? I would understand if the number of miners won, that is, a greater number of miners have such and such information, then the system accepts it as correct and synchronizes the data from those who changed it for themselves.

Answer 1

in the blockchain, the chain that is longer is accepted. i.e. the one with more power has done more work in PoW and his chain is accepted