Physics

Problem

A narrow slit of width

0.10\,\text{mm}

is submerged in water (index of refraction

n=1.33

) and illuminated with monochromatic light from an unknown source. A screen

1.5\,\text{m}

away shows the first dark fringe at a distance of

4.0\,\text{mm}

from the center of the pattern. What is the wavelength of the light in air? a)

472\ \text{nm}

354\ \text{nm}

267\ \text{nm}

532\ \text{nm}