07 Mar '07 16:12

It's way in the future. I am reading a story called "Pandora's Star"

and in it there is this piece about the earth going green energy-wise by having a belt of solar cells all the way round the moon and shipping the energy to earth. So if the belt of solar cells is 800 Km wide, and we assume half the available energy actually makes it to earth and the population in that era is 10 billion, how much energy per person would be available? Since the moon turns round the sun once in 28 days, it means only a certain percentage of the cells are illuminated, so what would be that percentage, where 100% would be as if all the cells in the equatorial belt of cells were illuminated at once. Then figure out how much gets to earth.

and in it there is this piece about the earth going green energy-wise by having a belt of solar cells all the way round the moon and shipping the energy to earth. So if the belt of solar cells is 800 Km wide, and we assume half the available energy actually makes it to earth and the population in that era is 10 billion, how much energy per person would be available? Since the moon turns round the sun once in 28 days, it means only a certain percentage of the cells are illuminated, so what would be that percentage, where 100% would be as if all the cells in the equatorial belt of cells were illuminated at once. Then figure out how much gets to earth.