1 Quantization of the Electromagnetic Field
... where in the second line we remembered the commutation relation which implies that â(−!k, λ)â(−!k, λ)† = 1 + â(−!k, λ)† â(−!k, λ). The constant will give the vacuum energy which in this calculation diverges (there is a really really long story about how to deal with this). In the second term we ...
... where in the second line we remembered the commutation relation which implies that â(−!k, λ)â(−!k, λ)† = 1 + â(−!k, λ)† â(−!k, λ). The constant will give the vacuum energy which in this calculation diverges (there is a really really long story about how to deal with this). In the second term we ...
Monday, April 27, 2009
... The system of the ice skater does not have any net external torque applied to her. Therefore the angular momentum is conserved for her system. By pulling her arm inward, she reduces the moment of inertia (Smr2) and thus in order to keep the angular momentum the same, her angular speed has to increas ...
... The system of the ice skater does not have any net external torque applied to her. Therefore the angular momentum is conserved for her system. By pulling her arm inward, she reduces the moment of inertia (Smr2) and thus in order to keep the angular momentum the same, her angular speed has to increas ...
