Q: Is light electromagnetic radiation within a certain portion of the electromagnetic spectrum? ¶
Q: Was light that waves were known to bend around obstacles? ¶
A: Yes, while light travelled only in straight lines.
Q: Was light composed of corpuscles which were emitted in all directions from a source? ¶
Q: Was light related to electromagnetism? ¶
Q: Is light rotated when the light rays travel along the magnetic field direction in the presence of a transparent dielectric? ¶
A: Yes, and an effect now known as Faraday rotation.
Q: Is light emitted and absorbed in tiny "packets" called photons and exhibits properties of both waves and particles? ¶
Q: Was light a high-frequency electromagnetic vibration? ¶
A: Yes, and which could propagate even in the absence of a medium such as the ether.
Q: Is light measured with two main alternative sets of units: radiometry consists of measurements of light power at all wavelengths? ¶
A: Yes, while photometry measures light with wavelength weighted with respect to a standardised model of human brightness perception.
Q: Was light a wave? ¶
A: Yes, and these waves could gain or lose energy only in finite amounts related to their frequency.
Q: Was light entirely transverse? ¶
A: Yes, and with no longitudinal vibration whatsoever.
Q: Is light intensity? ¶
A: Yes, and propagation direction, frequency or wavelength spectrum, and polarization, while its speed in a vacuum, 299,792,458 metres per second, is one of the fundamental constants of nature.
Q: Is light one of the five fundamental "subtle" elements out of which emerge the gross elements? ¶
Q: Was light performed in Europe by Hippolyte Fizeau in 1849? ¶
Q: Is light only a mechanical property of the luminous body and the transmitting medium? ¶
A: Yes, and Descartes' theory of light is regarded as the start of modern physical optics.
Q: Was light a mechanical property of the luminous body? ¶
A: Yes, and rejecting the "forms" of Ibn al-Haytham and Witelo as well as the "species" of Bacon, Grosseteste, and Kepler.
Q: Is light not orthogonal to the boundary? ¶
A: Yes, and the change in wavelength results in a change in the direction of the beam.
Q: Was light conducted by Ole Rømer? ¶
A: Yes, and a Danish physicist, in 1676.
Q: Was light emitted in all directions as a series of waves in a medium called the Luminiferous ether? ¶
Q: Was light a form of electromagnetic radiation: he first stated this result in 1862 in On Physical Lines of Force? ¶
Q: Is light a transverse wave? ¶