S
Sunil
- Jan 1, 1970
- 0
Hi....We did energy bands in class a few weeks ago...i should say that
i am clueless to a certain extent....
I have no idea about what effective mass is...can someone explain the
concept behind effective mass...i mean how can mass vary???the prof
drew a graph of the second derivative of energy against k...and it was
a kind of a sinusoidal wave...the prof mentioned that the point where
the second derivative is 0 is the point where effective mass is
infinite....how can mass be infinite...if it is...wont the system
become heavy???
Also, i didn't understand the reason for drawing the graph of energy
against k....it seems to be of no real consequence....
thank you...
sunil
i am clueless to a certain extent....
I have no idea about what effective mass is...can someone explain the
concept behind effective mass...i mean how can mass vary???the prof
drew a graph of the second derivative of energy against k...and it was
a kind of a sinusoidal wave...the prof mentioned that the point where
the second derivative is 0 is the point where effective mass is
infinite....how can mass be infinite...if it is...wont the system
become heavy???
Also, i didn't understand the reason for drawing the graph of energy
against k....it seems to be of no real consequence....
thank you...
sunil