Suppose a 4.90 m diameter telescope were constructed on the moon, where the absence of atmospheric distortion would permit excellent viewing. if observations were made using 508 nm light, what minimum separation between two objects could just be resolved on mars at closest approach (when mars is 8.0 ? 107 km from the moon?

One day, after pulling down your window shade, you notice that sunlight is passing through a pinhole in the shade and making a small patch of light on the far wall. you see that the patch of light seems to be a circular diffraction pattern. it appears that the central maximum is about 1 cm across and you estimate that the distance from the window shade to the wall is about 3 m. what is (a) the average wavelength of sunlight? (b) the diameter of the pinhole?

Assume similar data for the motion of the blood in your aorta. estimate how many beats of the heart it will take the blood to get from your heart to your brain. (assume that the distance from your heart to your brain is 30 cm)

What is the orbital period of a spacecraft in a low orbit near the surface of mars? the radius of mars is 3.4×106m.