^ Transverse - the wave has vibrations at right angles to the energy. Eg light Longitudinal - the wave has vibrations in the same direction as the energy. Eg vibrations in gases
^ Transverse - the wave has vibrations at right angles to the energy. Eg vibrations in gases Longitudinal - the wave has vibrations in the same direction as the energy. Eg light
Just if it helps anyone on here. I made an annotated formula sheet for this unit, which I, and those in my class have found very useful. It is great to help during revision, and then you should become familiar with all of the information on it, and only need to to occassionaly check things. It has all the equations, all the symbols used, and what they mean, (e.g. n=number of charge carries per meter cubed), and simple names for them which give their use. I hope it is able to help some of you, it has kindly been uploaded here:
^ Transverse - the wave has vibrations at right angles to the energy. Eg vibrations in gases Longitudinal - the wave has vibrations in the same direction as the energy. Eg light
the method i did was as follows 3x1015 photons 20% of that is 6x14 electrons.
In the previous part it tells you 3x10^15 photons emitted by the laser per second, we're expected to know interactions with electrons are instantaneous (though its really about 10^-9 s ) So every second 3x10^15 photons emitted, 20% of these release electrons, so every second there's 6x10^14 electrons released, they reach the conducting layer very quickly since the hint they give you is that a a potential difference is applied which cause the electrons to move from one layer to the other.
the method i did was as follows 3x1015 photons 20% of that is 6x14 electrons.
In the previous part it tells you 3x10^15 photons emitted by the laser per second, we're expected to know interactions with electrons are instantaneous (though its really about 10^-9 s ) So every second 3x10^15 photons emitted, 20% of these release electrons, so every second there's 6x10^14 electrons released, they reach the conducting layer very quickly since the hint they give you is that a a potential difference is applied which cause the electrons to move from one layer to the other.
the method i did was as follows 3x1015 photons 20% of that is 6x14 electrons.
In the previous part it tells you 3x10^15 photons emitted by the laser per second, we're expected to know interactions with electrons are instantaneous (though its really about 10^-9 s ) So every second 3x10^15 photons emitted, 20% of these release electrons, so every second there's 6x10^14 electrons released, they reach the conducting layer very quickly since the hint they give you is that a a potential difference is applied which cause the electrons to move from one layer to the other.