# Reflectance and phase shift vs incident angle and wavelength

Plot the refectance and phase shift on reflection $\varphi$ for p and s polarized light versus incident angle $\theta$ for various wavelength $\lambda_1=.., \lambda_2=..,..$ in the simple case of reflection from a bare substrate given the complex refractive index $N=..$ of the substrate.

Since the reflectance is $$R=(\frac{1-\eta_{s,p}}{1+\eta_{s,p}})(\frac{1-\eta_{s,p}}{1+\eta_{s,p}})^*$$ where $\eta_{s,p}$ is $Ncos\theta$ and$\frac{N}{cos\theta}$ for s and p polarized light. Also, the phase shift on reflection is:$$\varphi=\arg(\frac{1-\eta_{s,p}}{1+\eta_{s,p}})$$

I can see the dependence of $R$ and $\varphi$ on the incident angle, but how can i plot it at different wavelength ? i don't see the dependence of $R$ and $\varphi$ on wavelength at all.

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Isn't the refractive index dependent on wavelength? –  Ondřej Černotík Nov 19 '12 at 10:45
i thought so too, but the question asked to plot the graph for different wavelengths of the same refractive index N of the substrate :O –  Lorenz Nov 19 '12 at 11:02