theta = 0.412 degrees .

When p = 0 
theta = 0.026 degrees . 

When p = 1 
theta = 0.078 degrees . 

When p = 2 
theta = 0.129 degrees . 

When p = 3 
theta = 0.181 degrees . 

When p = 4 
theta = 0.233 degrees . 

When p = 5 
theta = 0.285 degrees . 

When p = 6 
theta = 0.337 degrees . 

When p = 7 
theta = 0.388 degrees . 

When p = 8 
theta = 0.440 degrees . 

 When p >= 8 ,  theta > 0.412 degrees .

Between the first two diffraction minima , 16 interference minima are possible.