Question

Suppose there is a planet orbiting close to a black hole, as Earth is to the Moon. There is an ocean on that planet. If you happen to be there, what would you notice? Select one:

a. The ocean has tides, but only once per day, unlike Earth when we have them twice per day

b. The ocean has tides, but they are way higher than on Earth

c. The ocean has tides, but they are way smaller than on Earth

d. You notice nothing, as you are so close to black hole that you will fall into it, in no time

Answer 1

As the planet is very close to the black hole the gravitational pull on the planet is very strong. But as the planet is orbiting the black hole, it won't fall in it. But the strong force creates huge tides. The frequency of the tides depends on the period of the revolution of the planet on its axis. So, the correct answer is

B) The ocean has tides, but they are way higher than on the earth.