Asked by Alex

2) A single slit diffraction pattern is created using light of wavelength 700nm and a slit which is 0.020mm wide.
a) What is the angular width of the central diffraction bright region?

b) How wide is the central bright region observed on a screen located 20cm from the slit?
Answered by drwls
Use the website reference provided in my previous answer about diffraction around a wire.