SCIENCE
PHYSICAL SCIENCES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Five million
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One million km
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Ten million km
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One hundred million km
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Detailed explanation-1: -Light-year is the distance light travels in one year. Light zips through interstellar space at 186, 000 miles (300, 000 kilometers) per second and 5.88 trillion miles (9.46 trillion kilometers) per year.
Detailed explanation-2: -For most space objects, we use light-years to describe their distance. A light-year is the distance light travels in one Earth year. One light-year is about 6 trillion miles (9 trillion km). That is a 6 with 12 zeros behind it!
Detailed explanation-3: -In a vacuum, light travels at 670, 616, 629 mph (1, 079, 252, 849 km/h). To find the distance of a light-year, you multiply this speed by the number of hours in a year (8, 766). The result: One light-year equals 5, 878, 625, 370, 000 miles (9.5 trillion km).
Detailed explanation-4: -A light-year, alternatively spelled light year, is a large unit of length used to express astronomical distances and is equivalent to about 9.46 trillion kilometers (9.46×1012 km), or 5.88 trillion miles (5.88×1012 mi).
Detailed explanation-5: -A light-year is a unit of distance. 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.