A star is seen to be rising on the eastern horizon at 23:00 hrs. At what time the star will rise 2 days later
00:00 hrs
21:40 hrs
23:20 hrs
23:00 hrs
A
23:20 hrs
B
00:00 hrs
C
21:40 hrs
D
23:00 hrs
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Solution
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The correct option is D23:00 hrs
As a Star very far from us appears moving due to the earth's rotation about its axis. Its period to rise is exactly equal to the time required for one complete rotation of the earth. Because each takes exactly 24 hours to complete one rotation. So after days (2×24hrs). So star will be seen rising at the same time
(i.e.,23:00hrs)
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