Your microwave oven is fine, it’s just that it’s on the wrong setting.
Popcorn needs to be microwaved. Generally, microwave on high heat for 2 minutes is enough. However, sometimes there are still some that have not popped, so just heat it again.
The light wave function is mostly used for grilling large pieces of food. Generally, chicken wings, meat skewers, etc. are better at heating, but popcorn is not.
As for the distinction between microwaves and light waves, microwaves are mostly used for heating products, and light waves are used for meat and barbecue products. This way, you will not use the wrong ones after distinguishing.
I hope the microwave oven can bring more speed and convenience to your life.