query: Have we really measured the wavelength of light?
positive_passages.docid: 153488
positive_passages.text: How do you measure wavelength/frequency of light
negative_passages.docid: 36482
negative_passages.text: How can laser interferometry be used to measure path difference smaller than wavelength of laser light?
negative_passages.docid: 61077
negative_passages.text: Is every electromagnetic radiation considered "light"?
negative_passages.docid: 88092
negative_passages.text: Is it possible that by mutation a human could see infrared or other 'colours'?
negative_passages.docid: 20412
negative_passages.text: Frequency of a photon
negative_passages.docid: 122405
negative_passages.text: Why does the refractive index depend on wavelength?
negative_passages.docid: 11053
negative_passages.text: Planck's Law in terms of wavelength
negative_passages.docid: 81503
negative_passages.text: Do photons truly exist in a physical sense or are they just a useful concept like $i = \sqrt{-1}$?
negative_passages.docid: 57574
negative_passages.text: Are colors grounded in physics or are they a matter of human perception?
negative_passages.docid: 114913
negative_passages.text: What exactly is meant by the wavelength of a photon?
negative_passages.docid: 144886
negative_passages.text: How many possible electromagnetic wavelengths are possible?
negative_passages.docid: 51802
negative_passages.text: What is the frequency of a photon?
negative_passages.docid: 115239
negative_passages.text: Is the Speed of Light an universal spacetime constant, the velocity of electromagnetic waves, or of photons?
negative_passages.docid: 33110
negative_passages.text: The origin of the value of speed of light in vacuum
negative_passages.docid: 8438
negative_passages.text: Is Dr Quantum's Double Slit Experiment video scientifically accurate?
negative_passages.docid: 127351
negative_passages.text: Why can we only "see" reflected light?
negative_passages.docid: 41466
negative_passages.text: Can the photoelectric effect be explained without photons?