In a location where the speed of sound is 331 m/s, a 2000 Hz sound wave impinges on two slits 30 cm apart.
(i) At what angle is the first-order maximum situated?
(ii) When the sound wave is substituted by 4.00 cm microwaves, what slit separation provides the similar angle for the first-order maximum?
(iii) When the slit separation is 1.00 µm, what frequency of light provides the similar first-order maximum angle?