THE EARTH
PHYSICAL GEOGRAPHY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A Light year is the
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Mean distance between sun and the nearest star
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Mean distance between the earth and sun
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Mean distance travelled by light in one year
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Distance travelled by light in one year
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Explanation:
Detailed explanation-1: -Assertion :A light-year is a distance that light travels with velocity of 3×108 ms−1 in one year. Reason: Light year is the unit for measuring time.
Detailed explanation-2: -It is the distance that light can travel in one year. Light moves at a velocity of about 300, 000 kilometers (km) each second. So in one year, it can travel about 10 trillion km. More precisely, one light-year is equal to 9, 500, 000, 000, 000 kilometers.
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