What are the three types of metal detectors? How do metal detectors use electromagnetism to detect stuff? What kind of stuff can create interference when using a metal detector? Tune in as Jonathan and Chris explore the technology behind metal detectors.Learn more about advertising on the HowStuffWorks podcasts at www.howstuffworks.com/advertisers.htmAnd to learn about your ad choices when listening to podcasts, visit https://www.howstuffworks.com/privacy.htm#ad-choices
