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Question 1185399: Light travels about 2.998 x 108 meters per second. If the Sun and Earth are about 1.496 x 109 km apart, how long does it take light to travel to Earth? If the surface area of the Earth is 5.101 x 109 km2, and at any time about half of the Earth is covered in light, and there are approximately 3.6 x 1021 photons of light per m2, approximately how many photons of light are hitting the Earth at any moment?
Answer by Alan3354(69443)   (Show Source):
You can put this solution on YOUR website! Light travels about 2.998 x 108 meters per second.
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Use ^ (Shift 6) for exponents and * (Shift 8) for multiply.
eg, 2.998*10^8
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