InterviewSolution
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InterviewSolution
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A team of scientists at NASA with the European Space Agency are working to probe dark energy or the existence of dark matter. Consider the following statements in this regard. 1. Dark matter is called so because it does not interact with light. 2. Dark matter interacts with ordinary matter through gravity and binds galaxies together like an invisible glue. 3. While dark matter pulls matter together, dark energy pushes the universe apart at ever increasing speed. 4. Dark matters are potentially effective in many dignostic devices such as PET scanners. Which of the statements given above are correct? (a) 1, 2 and 3 only (b) 2, 3 and 4 only (c) 1, 3 and 4 only (d) 1, 2, 3 and 4. |
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Answer» The correct option is: (a) 1, 2 and 3 only Explanation: Dark matter is a type of matter hypothesized in astronomy and cosmology to account for a large part of the mass that appears missing from the universe, it does not interact with light. It is also hypothesized that it interacts with ordinary matter through gravity and binds galaxies, and it pushes the universe apart. |
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