...region the former will be more powerful in the red and the latter in the green. That the resolving power of a prismatic spectroscope of given dispersive material...number, angles, or setting of the prisms, is a most important—perhaps the most important—proposition in connection wiih this subject. Hitherto, in...

...region, the former will be more powerful in the red and the latter in the green. That the resolving power of a prismatic spectroscope of given dispersive material...number, angles, or setting of the prisms, is a most important—perhaps the most important—proposition in connexion with this subject. Hitherto, in descriptions...

...indices and p + 5/1, it is necessary that t should exceed the value given by the following equation : a change of refrangibility when we pass from the principal...corresponding to the first minimum of illumination. That the resolving power of a prismatic spectroscope of given dispersive material is proportional to the total...

...fj. and jit + 6/i, it is necessary that / should exceed the value given by the following equation : a change of refrangibility when we pass from the principal...corresponding to the first minimum of illumination. That the resolving power of a prismatic spectroscope of given dispersive material is proportional to the total...

...retardation of the extreme rays due to the change of refrangibility is the same, namely one wavelength, as that incurred without a change of refrangibility...corresponding to the first minimum of illumination. out regard to the number of angles, or setting of the prisms, is a most important, perhaps the most...

...retardation of the extreme rays due to the change of refrangibility is the same, namely one wavelength, as that incurred without a change of refrangibility...corresponding to the first minimum of illumination. out regard to the number of angles, or setting of the prisms, is a most important, perhaps the most...

...retardation of the extreme rays due to the change of refrangibility is the same, namely one wavelength, as that incurred without a change of refrangibility...corresponding to the first minimum of illumination. out regard to the number of angles, or setting of the prisms, is a most important, perhaps the most...

...the effective thickness of the material traversed by the extreme ray. “ That the resolving power of a prismatic spectroscope of given dispersive material...total thickness used, without regard to the number of angles or setting of the prisms, is a most important, perhaps the most important. proposition in...

...to the effective thickness of the material traversed by the extreme ray. " That the resolving power of a prismatic spectroscope of given dispersive material...total thickness used, without regard to the number of angles or setting of the prisms, is a most important, perhaps the most important, proposition in...