Physics

Problem

Monochromatic light passes through a single slit of width

0.12\,\text{mm}

and forms a diffraction pattern on a screen

1.8\,\text{m}

away. The distance from the center of the pattern to the first dark fringe is measured to be

4.5\,\text{mm}

. Assuming the screen is far enough away that the angle is small, what is the wavelength of the light? a)

150\,\text{nm}

450\,\text{nm}

300\,\text{nm}

600\,\text{nm}