The refractive index variation for CaF2 (in the visible region of the spectrum) can be wri...

The refractive index variation for CaF2 (in the visible region of the spectrum) can be written in the form

where λ is in meters.

(a) Plot the variation of n2 with λ in the visible region.

(b) From the values of A1 and A2 show that m/M ≈ 2.07 × 10– 5 and compare this with the exact value.

(c) Show that the value of n∞ obtained by using the constants A1, A2, λ1 and λ2 agrees reasonably well with the experimental value.