Why do asteroids and comets differ in composition? asteroids and comets formed at different times. asteroids formed inside the frost line, while comets formed outside. asteroids are much larger than comets. comets are much larger than asteroids. comets formed from the jovian nebula, while asteroids did not?

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?