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5] Assuming that the light-year is the distance covered by light in one year. Find the order of itsmagnitude. (Velocity of light 3 x 103 m/s, 1 year 365 days.) [Ans: 10 16 m.] |
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Answer» (a) Order of magnitude is defined as the power of 10 used to express the magnitude of a physical quantity under consideration, e.g.,(i)Order of magnitude of time intervals of 1.2 x ${{10}^{-6}}sis-6.(ii)Order or magnitude of distance of 4.5 x {{10}^{6}}is + 6.(b) 1 light year = 9.46 x {{10}^{15}}m = {{10}^{16}}mOrder of magnitude of light year is 16 |
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