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HNQ
3:40 AM
1
Q: Are colors grounded in physics or is it a matter of human perception

user163693My father was colorblind, and I always wondered if colors were a matter of physics or if different colors is just a human way of describing and differentiating our visual perception of the world? Fx. is the color blue by nature blue, or is it just what we see?

 
 
11 hours later…
HNQ
2:30 PM
2
Q: How Translation Operator is defined?

anbhadaneHere, In Shankar's (2nd edition, p-283) QM book, The translation operator is given by $$T(\epsilon) = I - \frac{i\epsilon}{\hbar}G \tag{11.2.13}$$ Similar In Sakurai (Revised edition 1994 p-45), he wrote about equation as following, “We now demonstrate that if we take the infinitesimal transl...

 
HNQ
3:19 PM
2
Q: Generalised coordinates

Finn EggersI am working on a scientific project for my university and I am reading a german paper (Karas: "Platten unter seitlichem Stoß") which makes use of generalised coordinates. It's about an analytical solution of the impact of a ball on a plate. At some point, he defines the potential energy for t...

 

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