The equation ω=μu-μrμ-1 was derived for a prism having small refracting angle. Is it also valid for a prism of large refracting angle? Is it also valid for a glass slab or a glass sphere?
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The equation ω = μu-μrμ-1 was derived for a prism having small refracting angle.
It is also not valid for a prism of large refracting angle.
It is also not valid for a glass slab or a glass sphere.
Explanation:
- Dispersive power is calculated by angular variance, and angular deviation is only true for a small refracting angle and a small incidence angle.
- The dispersive power is therefore not true for a broad refracting angle prism.
- It is also not true for a glass slab or a glass sphere, since it has a wide angle of refraction.
Dispersive power :
The ability of a impermeable medium to distinguish different colors of light by refraction as determined by the difference in refractivity for two given widely different wavelengths, separated by refractivity at some intermediate wavelengths mentioned.
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