What is the speed of light in km per second?
a) 300
b) 3000
c) 30000
d) 300,000
How much time would take a modern jet fighter to cross our Milky Way?
a) 1 million years
b) half million years
c) 100000 millionyears
d) 2 billionyears
Which of the following unit is used for measurement of distance in space?
a) meter
b) km
c) mile
d) light year
Explanation: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, or 5.88 trillion miles.
How much estimated distance is travelled by light one light year?
a) 10 trillion meter
b) 10 trillion km
c) 10 billion meter
d) 10 billion km
More precisely one light year is the distance traveled by light in one year which is equal to……….meter.
a) 9.5x106
b) 9.5x109
c) 9.5x1012
d) 9.5x1015
How much time is taken by sunlight to reach our earth?
a) 2 minutes
b) 4minutes
c) 8 minutes
