A quarter-wave antireflection coating with index of refraction is applied to a glass lens

PHYSICS · Single correct · A Level · Physics · Waves · Waves

Problem

A quarter-wave antireflection coating with index of refraction

n=1.30

is applied to a glass lens. For light of wavelength

600\,\text{nm}

in air that is incident normally, what is the minimum non-zero thickness the coating should have? (a)

1.50\times10^{2}\,\text{nm}

(b)

2.31\times10^{2}\,\text{nm}

(c)

1.15\times10^{2}\,\text{nm}

(d)

1.00\times10^{2}\,\text{nm}