The Theory of Light |
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Common terms and phrases
amplitude analyser angle of incidence aperture axis bands beam bright centre circle colours components consequently corresponding cos² crystal curve dark determined deviation difference of phase diffraction direction displacement distance disturbance diverging double refraction effect electric elliptic vibration emerging emission theory energy equal equation ether experiment Fresnel fringes glass grating half-period elements Hence illumination incident light intensity interference lens luminous maximum medium mirror molecules motion Nicol observed optic axes ordinary ordinary ray parallel particle passes pencil perpendicular phenomena plane of incidence plane of polarisation plane wave plane-polarised light polarised light position principal plane prism produced propagated quartz radius reflected light reflected wave refracted rays refractive index retardation right angles rings rotation screen sin² slit spectrum substance tangent thickness thin plate tion transmitted velocity vibration violet wave front wave length wave surface zero
Popular passages
Page 18 - Those that are averse from assenting to any new discoveries but such as they can explain by an hypothesis may for the present suppose that, as stones by falling upon water put the water into an undulating motion and all bodies by percussion excite vibrations in the air, so the rays of light...
Page 18 - Stones by falling upon Water put the Water into an undulating Motion, and all Bodies by percussion excite vibrations in the Air, so the Rays of Light, by impinging on any refracting or reflecting Surface, excite vibrations in the refracting or reflecting Medium or Substance, and by exciting them agitate the solid parts of the refracting or reflecting Body, and by agitating them cause...
Page 19 - Is not the heat of the warm room conveyed through the vacuum by the vibrations of a much subtiler medium than air, which, after the air was drawn out remained in the vacuum?
Page 18 - Were I to assume an hypothesis, it should be this, if propounded more generally so as not to determine what light is, further than that it is something or other capable of exciting vibrations in the aether...