The energy of a photon of light is proportional to its frequency and proportional to its wavelength.

If steel is more dense that lake water, why can a boat float

What is the angular momentum of the bar about the axle?

The star betelgeuse is about 600 light-years away. if it explodes tonight, a. we'll know because debris from the explosion will rain down on us from space.b. we'll know it immediately because it will be brighter than the full moon in the sky.c. we won't know about it until 600 years from now.d. none of the above.