[BONUS 1] A double slit interference experiment is conducted using two sources of light that both produce the same frequency of light, but are completely out of phase with each other. What effect will this have on the pattern on the screen?
There will be more mimima
There will be less minima
The pattern of maxima and minima will be reversed
There will be no pattern at all
There will be no change in the pattern

Step 1 ：A double slit interference experiment is conducted using two sources of light that both produce the same frequency of light, but are completely out of phase with each other.

Step 2 ：The pattern on the screen is determined by the constructive and destructive interference of the light waves from the two sources.

Step 3 ：If the two sources are completely out of phase with each other, it means that when one source is at its peak, the other is at its trough.

Step 4 ：This would result in destructive interference, where the waves cancel each other out.

Step 5 ：Therefore, the pattern on the screen would be reversed, with the maxima becoming minima and vice versa.

Step 6 ：\(\boxed{\text{The pattern of maxima and minima will be reversed.}}\)