Two spacecraft are both 10 million kilometers from a star. The total power output of the star is 4 x 1025 W. Spacecraft 1 has a solar panel with a radius of 18 m. Spacecraft 2 has a solar panel with a radius of 6 m. What is the ratio of the power collected by the solar panel of Spacecraft 1 to the power collected by the solar panel of Spacecraft 2. a. 0.11 b. 0.06 c. 9 d. 18 e. 1 f. 0.33 g. 3

The concept of power is given by the relationship between intensity and area, that is to say that power is defined as

Our values are given under the condition of,

The power is proportional to the Area, and in turn, we know that the Area of a circle is the product between  times the radius squared, therefore the power is proportional to the radius squared.

For both panels we would have to

Therefore the correct option is option C.9

the electric field is a “force field” around a charged object that illustrates the direction the electric force would push an imaginary 

see earlier answer