A piece of crown glass ( ) is to be coated on one side with a single layer of…

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

Problem

A piece of crown glass (

n=1.50

) is to be coated on one side with a single layer of magnesium fluoride (

n=1.38

) so that reflected light of wavelength

\lambda_{0}=550\,\text{nm}

in air is minimized at normal incidence. Calculate the required physical thickness

t

of the magnesium-fluoride layer.