Thomas Alva Edison<span> (February 11, 1847 – October 18, 1931) was an American inventor and businessman, who has been described as America’s greatest inventor.</span><span> He developed many devices that greatly influenced life around the world, including the </span>phonograph<span>, the </span>motion picture camera<span>, and the long-lasting, practical electric </span>light bulb<span>. </span><span>the most important thing to be successful is his famous quote:
</span><span>Genius is one percent inspiration and ninety-nine percent perspiration.</span>
Answer:
Explanation:
thickness of aerosol layer is 2.5 km
zenith angle is 40 degree
we know that
where
is extinction coefficient
extiction cross section
N = Concentration
transimiitance 
The movement of weathered material such as gravel,soil, and sand is called erosion.
