GK
BASIC GENERAL KNOWLEDGE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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intensity
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distance
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energy
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speed
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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: -The term light-year is often used in astrophysics to measure the distance between two astronomical objects. Light travels at a velocity of about 300, 000 kilometres (km) per second. It can travel about 10 trillion km. More precisely, one light-year is equal to 9, 500, 000, 000, 000 kilometres.
Detailed explanation-3: -light year is distance traveled by light in a year.
Detailed explanation-4: -1 light year =9, 460, 000, 000, 000 km. (a) Express one light year in scientific notation. (b) The average distance between Earth and Sun is 1.496×108km.