In photoelectric effect, as for the incident light, which restriction for the light is right in the following ?
A、acts more like a wave
B、acts more like a particle
C、shows the wave-particle duality.
D、can be wave and particle both.
A、acts more like a wave
B、acts more like a particle
C、shows the wave-particle duality.
D、can be wave and particle both.
Assume that a andare in turn annihilation and creation operators subject to the harmonic oscillator potential. (1) Please give explicitly the x and p in terms of these operators. (2),please calculate the coefficient.
Letbe the annihilation and creation operators of the fermion, respecitively. Thus, it has the relations:is the particle number operator. Please prove N just has eigen value 1 or 0.
Let the operator be, please prove the vacuum expectation value of(normal product) is zero, namely. Note thisrepresents a kind of the interaction between fermions and boson with g being the coupling constant. (hint: the fields can be expanded by plane waves.)
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