The Theory of Light

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 doubly refracting edge effect elliptic vibration emerging emission theory energy equal equation ether Fresnel fringes glass grating half-period elements Hence illumination incident light intensity interference lens luminous maximum medium mirror molecules motion Newton Nicol observed optic axes ordinary parallel 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 ray refractive index retardation rings rotation screen sin² slit spectrum sphere spherical substance telescope thickness thin plate tion transmitted traversed velocity vibration violet wave front wave length wave surface zero