A lens of dense flint glass,

PHYSICS · Multi-part · Fermi University Physics · Optics & Photonics · Wave propagation and light in media · Wave propagation and light in media

Modes, Packets and Media, Ch Reflection, transmission, matching and tunnelling at boundaries

Problem

n_3=1.70

, is used in air,

n_1=1.00

, at normal incidence, and is to be coated for a design wavelength

\lambda_0=600\,\mathrm{nm}

. ((a)) Find the index of the ideal single-layer coating. ((b)) The coating is made instead of magnesium fluoride,

n_2=1.38

. Find the quarter-wave thickness. ((c)) Find the reflectance of the coated surface at

600\,\mathrm{nm}

, and compare it with the bare surface. ((d)) With the thickness fixed, find the reflectance at

450\,\mathrm{nm}