What people are saying - Write a review
We haven't found any reviews in the usual places.
Other editions - View all
amplitude analyser angle of incidence aperture axis beam bright centre circle colours components consequently corresponding cos2 crystal curve determined deviation difference of phase diffraction direction displacement distance disturbance diverging double refraction edge 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 normal 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 and refracted reflected light reflected wave refracted rays refractive index retardation right angles rings rotation screen sin2 slit spectrum substance tangent telescope thickness thin plate tion tourmaline transmitted traversed velocity velocity of propagation violet wave front wave length wave surface zero
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?