Giovanni was watching the night sky on a clear evening in November.He noticed that sometimes when he looked directly overhead he could detect a very faint star.A few minutes later it seemed that the star had disappeared,and then it "appeared" again.In this case,it is very likely that the light from the star was

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The fact that Giovanni occasionally saw the faint star when looking directly overhead suggests that the light from the star was just at the absolute threshold for light, meaning that it was just strong enough for him to detect it half of the time. The fact that it disappeared and reappeared could be due to factors such as fluctuations in the star's brightness or changes in the amount of background light that affected Giovanni's ability to perceive the star.

Giovanni Was Watching the Night Sky on a Clear Evening