THORLABS EDU-OT2, Руководство пользователя

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Portable Optical Tweezers Kit Chapter 8: Teaching Tips
Rev B, July 8, 2019 Page 75
arrows in blue and green. The direction of the vector arrow corresponds to the direction of
the momentum
and its length corresponds to the momentum’s magnitude.
Unfocused Laser Beam Momentum
For example, the vector labeled with 𝑝(𝑠, 1) depicts the momentum of the beam 𝑠 at
position 1. It important to note that the magnitude of the momentum, i.e., the length of the
arrows, does not change. However, the direction changes. In Figure 57, the vectors before
the entry of the beam into the sphere (position 1) and after the exit (position 3) are
subtracted to see how the momentum changes. The momentum change is depicted as
orange arrow.
Unfocused Laser Beam Momentum Changes