Two narrow slits spaced 100 microns apart are exposed to light of 600 nm. At what angle does the first minimum (dark space) occur in the interference pattern

The angle is  

Explanation:

From the question we are told that

   The  distance of separation is  

    The  wavelength of light is  

Generally the condition for destructive interference is mathematically represented as

Here  m is the order of maxima,  first minimum (dark space) m = 0

 So  

=>  

=>  

because if the tool that you are using is not balanced it there would be false mass.