Physics

The Sun appears about twice as large as Phobos in the Martian sky (shown above in a solar eclipse image from Mars). It takes Phobos approximately 300 of its radii to transit the shadow of Mars during a lunar eclipse. Using these values, a radius for Mars of 3,000,000 m, the ratio calculated in problem 9, calculate the radius of Phobos to one significant digit in meters. Draw the diagram of Sun, Mars, and Phobos, label the quantities, and solve using mathematical symbols for the radius of Phobos (call it RPh).