Constructive and Destructive Interference Physics

Constructive interference is when two waves add together to make a greater wave, and destructive interference is when two waves add together to cancel each other out (either completely or partially).
I explain how to solve interference problems in physics using some simple equations.

[@Tkcb2799]

Thanks for the clear explanation. Somehow my tutors can't explain such a "trivial" topic so they can't even provide clear formulas and explanations. Thanks for your help I appreciate it!