When light hits an atom, what is excited and jumps an energy level?
When light from a sun that passes through a thick atmosphere is split with a diffraction grating it appears to emit a
When hot dense materials like a tungstun filiment (in an incansecent lightbulb) is split with a diffraction grating it appears to emit a
Which has the least momentum?
Two objects have the same velocity, but one has twice the mass of the other. Compare the momentums of the two objects.
What is plasma in astronomy
explain the difference between fission and fusion
If an object like a star is moving towards the Earth, the spectral lines are observed to be
What is the difference between a mechanical wave and an electromagnetic wave?
When an astronomer looks at spectra from a star, they look at four different characteristics. Match the characteristic to what it means.
A wave along a string is a transverse wave. The fibers of the string move up and down. What moves along the string, perpendicular to the motion of the string?
A light shines red. In order to make the light shine blue you must
Before a rocket blasts off, the rocket is motionless and therefore has 0 momentum. When the rocket blasts off the rocket and the fuel are both moving, and therefore have momentum. How can momentum be conserved after a blast like that?
Explain why a cloud of a specific gas will emit only light at a specific wavelength but if you shine light through that same cloud, you will get a full spectrum _EXCEPT_ the lines at that specific wavelength.
Why does it seem like momentum is not conserved when a ball gains speed moving downhill?