A $2000$ Hz sound wave passes through a wall with two narrow openings $30$ cm apart. If sound travels on average $343$ m$/$s$,$ find the following. What is the angle of the first order maximum?

$($b$)$ Find the slit separation when you replace the sound wave with a $4\mathrm{.}25$ cm microwave, and the angle of the first order maximum remains unchanged.

m

$($c$)$ If the slit separation is $1\mathrm{.}00\mu$m$,$ what frequency of light gives the same first order maximum angle?

Hz