Hi,Would you please help me in this case:
According to relativity , the clocks work slower in a gravitational field and the stronger the field is, the slower the clock works.It means in the frame of an observer far from the event horizon of a blackhole, it takes an infinite time for an object(a spacecraft for example) to reach the event horizon so
the mass of a blackhole should never increase during the time because in our frame no object has fallen onto the event horizon.
Is this true?