Physics

Problem

A diffraction grating ruled with

300

lines per millimeter is illuminated with two spectral lines of wavelengths

560\,\text{nm}

and

589\,\text{nm}

. What is the angular separation between their second-order maxima? a)

0.5^{\circ}

1.7^{\circ}

1.0^{\circ}

0.7^{\circ}