Since, however, the difference of chromatic magnification cannot be overcome in powerful objectives, this error is still further increased by the eyepiece.
The phenomena of chromatic polarization afford a ready means of detecting doubly refracting structure in cases, such as that produced in isotropic bodies by strain, in which its effects are very minute.
In the apochromats the chromatic difference of the spherical aberrations is eliminated, for the spherical aberration is completely avoided for three colours.
In the interior the effect is gained by broad masses of chromatic decoration in marble-veneer and mosaics on a gold ground to cover the walls and vaults, and by elaborate pavements of opus sectile and opus Alexandrinum.
Be cemented and have the same refractive index for one colour, then its effect for that one colour is that of a lens of one piece; by such decomposition of a lens it can be made chromatic or achromatic at will, without altering its spherical effect.
With this mineral also spherical and chromatic aberration are a fraction of that of a glass lens, but double refraction, which involves a doubling of the image, is fatal to its use.
Fizeau he carried on a series of investigations on the intensity of the light of the sun, as compared with that of carbon in the electric arc, and of lime in the flame of the oxyhydrogen blowpipe; on the interference of heat rays, and of light rays differing greatly in lengths of path; and on the chromatic polarization of light.
The most interesting point about the morphology is the fact that two chromatic bodies, of very unequal size, are almost invariably to be recognized.
Even in apochromats it is not possible to entirely remove the chromatic difference of magnification, i.e.
A similar feeling is shown by them as colorists, and, though sometimes eccentric and daring in their contrasts, they never produce discords in their chromatic scale.