A DIY YouTuber shows you how to use soap bubbles to cancel light waves

Hint: it requires air, liquid, and then air again.

YouTuber The Action Lab always brings us interesting and exciting experiments and it's no secret that we are big fans. From his videos where he makes water dance on a flat surface to those where he makes a laser microscope from just a drop of water, the YouTuber is always messing with physics and engineering to delight and entertain us.

In this latest experiment, he shows us how to cancel light waves. To do this he has to create an environment where there is air, water, and then air again. 

He does this through the use of a soap bubble. As he sheds a white light on the soap bubble, we can see that the top part is completely black which means it is not reflecting any light. In other words, the lightwaves have been canceled.


How does this work? Well, the YouTuber explains that in great detail by using a slinky to describe how waves reflect in hard and soft boundaries. What are these boundaries and what do they have to do with light waves? How do light waves react to destructive interference?  The Action Lab answers and explores all these questions in this not-to-be-missed video.

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