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It is an example of optical illusion. They appear to twinkle, because light from the stars has to cross several layers of atmosphere with differing refractive indices to reach earth. As the atmospheric conditions in the different layers keep changing, the starts also appear to fade and shine at different times. Hence, option D is correct.
Ratio of the work done by P, Q and R in one day is 7:5:9 respectively. They all together can complete the work in 35 days. Q and R worked on it for 21 d...
Which of the following is incorrect regarding “PM Ujjwala Yojana”?
A person and his wife appear in the interview for the two vacancies of a post. The probability of the selection of the husband and that of the wife are ...
Who is the chairman of the Cabinet Committee on Security responsible for issuing the Indian Space Policy 2023?
A train passes an electrical pole in 18 seconds and passes a platform 420 m long in 60 seconds. Find the length of the train.
Match List-I (Multi-purpose river valley projects) with List-II (State) and select the correct answer using the codes given below the lists:
Under the Payment of Wages Act, 1936, what is the maximum limit of wages that can be paid in cash to an employee?
Two vehicles which are 100 km apart are running towards each other in a straight line. In how much time will they meet each other provided they follow ...
Which of the following books was not written by Amir Khusrau ?
What is the provision for fixed-term employment in the Code on Industrial Relations, 2020?