In solar cells

PHYSICS · Subjective · AP · Physics 2: Algebra-based · Waves Sound and Physical Optics · Waves Sound and Physical Optics

Problem

In solar cells, a silicon solar cell with

\mu=3.5

is coated with a thin film of silicon monoxide,

\mathrm{SiO}

, with

\mu=1.45

to minimize reflective losses from the surface. Determine the minimum thickness of

\mathrm{SiO}

that produces the least reflection at a wavelength of

550\,\mathrm{nm}

near the centre of the visible spectrum. Assume approximately normal incidence.