Here's a Question! - Small Pinhole vs. Large Pinhole
The image of a lightbulb is projected onto the back of a pinhole camera. A pencil is used to make the hole larger. What happens to the image?
Announcer: Frostbite Theater presents... Cold Cuts! No baloney!
Joanna and Steve: Just science!
Joanna: Hi! I'm Joanna!
Steve: And I'm Steve!
Joanna: Here's a question for you...
Steve: The image of a lightbulb is projected onto the back of a pinhole camera.
Joanna: A pencil is used to make the hole larger.
Steve: What happens to the image?
Joanna: Does it become dimmer and sharper?
Steve: Does it become brighter and sharper?
Joanna: Does it become dimmer and blurrier?
Steve: Or, does it become brighter and blurrier?
Joanna: Pause the video now if you'd like to think it over before we show you what happens.
Steve: Since the pinhole is larger, more light gets in, so the image is brighter.
Joanna: The image is also blurrier because the larger pinhole is less restrictive. It's easier for light coming from different directions to hit the same spot on the image.
Steve: This is why you don't see images of the outside world projected on the walls of a typical room. Windows are too big. The images they make are so blurry there isn't a discernible image at all.
Joanna: Thanks for watching. I hope you'll join us again soon for another question!
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