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The sun gives light at the rate of 1500 W/m2 of area perpendicular to the direction of light. Assume the wavelength of light as 5000Å. Calculate the number of photons/s arriving at 1 m2 area at that part of the earth.

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The sun gives light at the rate of 1500 W/m<sup>2</sup> of area perpendicular to the direction of light. Assume the wavelength of light as 5000Å. Calculate the number of photons/s arriving at 1 m<sup>2</sup> area at that part of the earth.






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