query: Why doesn't a backward wave exist? (Huygens principle)
positive_passages.docid: 104902
positive_passages.text: How does Huygens Principle incorporate the unidirectional property of a traveling wave?
negative_passages.docid: 68158
negative_passages.text: Does wave-particle duality exist for gravitational waves?
negative_passages.docid: 139857
negative_passages.text: Will stationary charge radiate E.M waves if observer is accelerating?
negative_passages.docid: 131965
negative_passages.text: Why can't a real scalar couple to the electromagnetic field?
negative_passages.docid: 72773
negative_passages.text: Is Bohmian mechanics really incompatible with relativity?
negative_passages.docid: 133044
negative_passages.text: Intuitive explanation of the difference between waves in odd and even dimensions
negative_passages.docid: 151549
negative_passages.text: Why can't transverse waves travel through a liquid?
negative_passages.docid: 42225
negative_passages.text: Why can't the angular momentum vector be parallel or anti-parallel to the applied magnetic field?
negative_passages.docid: 127329
negative_passages.text: A problem about wave equation
negative_passages.docid: 86095
negative_passages.text: Why isn't the symmetric twin paradox a paradox?
negative_passages.docid: 11602
negative_passages.text: Validity of naively computing the de Broglie wavelength of a macroscopic object
negative_passages.docid: 69854
negative_passages.text: Why is there a minus sign in this wave equation derivation?
negative_passages.docid: 40683
negative_passages.text: What's wrong with the square root version of the Klein-Gordon equation?
negative_passages.docid: 97464
negative_passages.text: Are there weak force waves?
negative_passages.docid: 85828
negative_passages.text: EM wave generation from different frames of reference
negative_passages.docid: 12465
negative_passages.text: An explanation for the Landauer's principle
negative_passages.docid: 85774
negative_passages.text: Looking for the actual reason of refraction explained precisely without analogies