A single slit of width is illuminated with light of wavelength

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

Problem

A single slit of width

0.020\,\text{mm}

is illuminated with light of wavelength

450\,\text{nm}

. What is the highest-order diffraction minimum that can be observed on either side of the central maximum? Provide the integer order number.