Long ago, people didn't have fancy clocks or lasers, but they were still curious about light. One smart guy named Alhazen figured out that if you cover a lamp with a plate and make a tiny hole, the light would come through like a tunnel. He watched how long it took for the light to reach his eyes, that's how he guessed the speed of light!
Examples
- Alhazen watched light travel through a tunnel like watching someone walk from one end to another.
- It’s like waiting for your friend to come through a small window, you know they’re coming, but it takes time.
- He measured the delay in light just like we count seconds when we see lightning and then hear thunder.
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See also
- How Did the Ancient Greeks Measure Distance?
- How Do Mirrors Reflect Light and Why Do We See Ourselves?
- How Do Mirrors Actually Work?
- How Do ‘Mirrors’ Reflect Our Image So Clearly?
- How Do Mirrors Reflect Light So Clearly?
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