BrainStuff •
iHeartRadio

How Glowing Watch Hands Work

BrainStuff

In many watches, phosphor is mixed with a radioactive element that continously charges the phosphor, powering glowing watch hands. Learn more about glowing watch hands in this HowStuffWorks podcast.

Learn more about your ad-choices at https://news.iheart.com/podcast-advertisers
Read more
00:0000:00