We have two waves of light, A and B. Wave A has a higher frequency than wave B. Then wave B must have:

What property is a characteristic of a substance that can be observed and does not change the identity of the substance

Use the right-hand rule for magnetic force to determine the charge on the moving particle. this is a charge.

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.