Sentence Examples

  • If the slit is of 'constant width and we require the illumination at various points on the screen behind it, we must regard the arc of the curve as of constant length.
  • The only effect of the ruling is to diminish the amplitude in the ratio a: a+d; and, except for the difference in illumination, the appearance of a line of light is the same as if the aperture were perfectly free.
  • 2, B), since there is no difference in the illumination and other external conditions, --------
  • On either side of any one of them the illumination is distributed according to the same law as for the central image (m = o), vanishing, for example, when the retardation amounts to (mn t 1)X.
  • In any case the proportion of the whole illumination to be found outside the circle of radius r is given by J02(z)+J12(z).