Question

1) What is light year?
2) What is the speed of light?
3) 1 micron (µ) = ______ m
4) 1 angstrom Å = ______ m
5) 2 km = ________ m
2021 m = _____km ___m


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Answer 1

Answer:

1. It's the distance travelled by light in vaccum in 1 year.

2.Its approximately 3×10⁸ m/s

3.1×10^-6

4.1×10^-10

5.2000

6.2 , 21

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Answer 2

Answer:

happy army day

purple you forever

be happy always

Explanation:

• The light-year is a unit of length used to express astronomical distances and is equivalent to about 9.46 trillion kilometres or 5.88 trillion miles. As defined by the International Astronomical Union, a light-year is the distance that light travels in vacuum in one Julian year.
• The speed of light in vacuum, commonly denoted c, is a universal physical constant important in many areas of physics. Its exact value is defined as 299792458 metres per second
• 1 micron (µ) = 0.000001 meter (m).
• 1× 10-10 metre
• 2000 metres