Light for studentsMacmillan, 1919 - 579 pages |
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Common terms and phrases
air film amplitude angle of incidence aperture bands blue bright bright band calcite circle circular colour concave convergent lens cornea corresponding crystal curve d₁ determine deviation diffraction direction displacement divergent edge emitted equal equation ether EXPT extraordinary ray eye-piece f₁ film focal length fringes gives rise glass half-period elements illuminated image formed incident ray incident wave internally reflected lenses luminous medium mirror motion negative nodal point normal object obtained optic axis ordinary ray paper parallel particles passing path pencil perpendicular phase plane of incidence plate polarised light position principal plane prism produced radius of curvature real image reflected ray reflected wave refracting surface refractive index resultant retina right angles rotated screen seen similar slit spectra spectrum spherical aberration straight line subtends telescope termed thickness tourmaline transmitted velocity vibrations violet wave front wave plate wave surface wave-length wavelets
Popular passages
Page 171 - And in like manner, when a Ray of Light falls upon the Surface of any pellucid Body, and is there refracted or reflected, may not Waves of Vibrations, or Tremors, be thereby excited in the refracting or reflecting Medium at the point of Incidence...
Page 171 - And are not these vibrations propagated from the point of incidence to great distances ? And do they not overtake the rays of light, and by overtaking them successively, do they not put them into the Fits of easy Reflection and Easy Transmission described above...
Page 425 - Law If a plane polarized beam of light is allowed to fall on a polarizer, the intensity of the transmitted beam is proportional to the square of the cosine of the angle between the plane of polarization of the incident light and the plane of polarization that would be required for total transmission of the beam. Malus...
Page 97 - Given a prism of a substance of known index of refraction, show how to calculate the deviation produced by it under any given circumstances, especially when the ray goes through the prism symmetrically. Given...
Page 255 - Argand lamp, from incandescent platinum, and even from non-luminous heated brass, through slices of tourmaline cut parallel to the axis of the crystal, a portion of the heat is polarized, when the axes of the crystals are at right angles to each other ; and these results were confirmed by M. Melloni. But Professor Forbes did not allow the polarization of heat to rest solely upon the results obtained with tourmaline. By employing bundles of plates of...
Page 235 - According to the wave theory of light, the index of refraction of a medium is equal to the ratio of the velocity of light in vacuum to that in the medium.
Page 40 - BOOK IV CHAPTER I 1. Given the law of reflection, prove that the image of an object in a plane mirror is on the perpendicular to the mirror and as far behind as the object is in fiont.
Page 418 - The laws of specular reflection are: (first law) the reflected ray lies in the same plane as the incident ray and the normal...
Page 52 - ... the three angles of a triangle are together equal to two right angles, although it is not known to all.
Page 97 - A ray of light is refracted through a prism in a plane perpendicular to its edge ; find the deviation produced by refraction.