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4. If the velocity of light is 3.0 x 100 metres per selight in a light year and express it in standard form.gnt is 3.0 x 100 metres per second, calculate the distance travelled |
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Answer» The speed of light in vacuum is 3 x 10^8 m/s. That means in one second it travels 300000000 metres. As we know, in one year, there are 365 days; in each day there are 4 hours; in each hour there are 60 minutes and in each minute there are 60 seconds. Therefore, the distance traveled by light in one year = 3 x 10^8 x 365 x 24 x 60 x 60 =1 light year = 9.4605284 × 1015meters |
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