Your phone screen is like a sandwich, you can see the outside, but not what’s inside. Imagine your screen has layers of different materials. Light comes through the top layer and bounces back instead of going all the way through. That’s why even though it looks clear, you can’t actually see behind the screen.
Examples
- You tap your phone on a table, you see the table through the screen, but it’s still just a faint outline.
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See also
- Why Do We Get 'The Runs' on Planes?
- How Does a Fridge Keep Food Cool?
- How Does a Smartphone Recognize Your Face?
- How Did the Internet Begin?
- Why Do We Use Passwords for Security?