# Time dilation

Level pending

Clock A and B are exactly the same on earth. Now, clock B is on a space travel as in the picture. The spaceship is flying at a uniform velocity of $$0.8$$ c ($$80$$% of the velocity of light). Which of the following statements is correct?

a) When $$6$$ seconds passes on clock B, the observer watching the clock B through a telescope from earth will see $$10$$ seconds passing.

b) When $$6$$ seconds passes on clock A, the observer watching the clock A through a telescope from the spaceship will see $$10$$ seconds passing.

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