Medium General Science GENERAL SCIENCE FPSC Question The speed of light in vacuum is about A 300 Million meters per second B 300 Million meters per hour C 300,000 kilometers per second D 300 Million kilometers per hour Submit Answer Try Again Explanation Explanation Light travels at about 300,000 kilometers per second i n a vacuum with a refractive index of 1.0, but slows down to 225,000 kilometers per second in water and 200,000 kilometers per second in the glass. ND16-3-2023 Show Explanation Previous MCQ All MCQs Next MCQ More MCQs in General Science Medium Birds exhibits which of the following traits? Birds exhibits which of the following traits? Medium Which of the following is/are the characteristics of reptiles? Which of the following is/are the characteristics of reptiles? Medium Which of the following is/are characteristics of amphibians? Which of the following is/are characteristics of amphibians? Medium Which of the following is/are characteristics of fish? Which of the following is/are characteristics of fish?