The Earth is 1.50*10^11 m from the Sun. The sun illuminates the Earth with sunlight intensity 1300W/m^2.

( a ) What total electromagnetic power does the Sun emit ?

The Earth has radius 6.40 x 10^6 m . ( b ) How much electromagnetic power does the Earth receive ? ( For comparison , total human power consumption is currently 4.20 * 10^12W.)

Pluto is 40 times further from the Sun than the Earth .

( c ) What sunlight intensity illuminates Pluto ?

( d ) How long in hours does light take to travel from the Sun to Pluto ?