Certain insects can achieve seemingly impossible accelerations while jumping. the click beetle accelerates at an astonishing 400g over a distance of 0.58 cm as it rapidly bends its thorax, making the "click" that gives it its name.
a. assuming the beetle jumps straight up, at what speed does it leave the ground?
b. how much time is required for the beetle to reach this speed?
c. ignoring air resistance, how high would it go?

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?

In what direction does the medium move relative to the direction of the wave? explain.

Why do electron microscopes have higher resolving power than light microscopes?