Determine the minimum non-zero thickness a magnesium-fluoride coating ( ) on glass…

PHYSICS · Subjective · A Level · Physics · Waves · Waves

Problem

Determine the minimum non-zero thickness a magnesium-fluoride coating (

n=1.38

) on glass should have so that it appears bright green in reflected light of wavelength

550\,\text{nm}

in air at normal incidence.