Undergrad Can Electrons or Photons Exceed Light Speed?

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Electrons and photons cannot exceed the speed of light, according to established physics. The discussion references a book by Eric Kraft that humorously explores physical existence in elemental terms. Despite the engaging narrative, the core question remains focused on the speed limits of these particles. The consensus is clear: nothing can surpass light speed in a vacuum. This fundamental principle is upheld in modern physics.
cathrynliz
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The title is from a great book by Eric Kraft, who plays around with one's physical-being in elemental terms in an excellent novel. He is very funny.
To get down to my question: Do electrons or photons on anything move faster than the speed of light?
 
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cathrynliz said:
The title is from a great book by Eric Kraft, who plays around with one's physical-being in elemental terms in an excellent novel. He is very funny.
To get down to my question: Do electrons or photons on anything move faster than the speed of light?
No.
 
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Thread 'Two equivalent statements of time reversal symmetric Hamiltonian'

Time reversal invariant Hamiltonians must satisfy ##[H,\Theta]=0## where ##\Theta## is time reversal operator. However, in some texts (for example see Many-body Quantum Theory in Condensed Matter Physics an introduction, HENRIK BRUUS and KARSTEN FLENSBERG, Corrected version: 14 January 2016, section 7.1.4) the time reversal invariant condition is introduced as ##H=H^*##. How these two conditions are identical?
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