Lesson 3 of 11
Better tools
Show on a big screenIs that one lamp in the photo, or two?
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The idea
It may be two lamps that look like one.
A thermometer, a microscope and a telescope are instruments. They help us measure or look.
A picture is made of small squares. Each square shows one thing. The rows and columns of squares form a grid.
A finer grid gives smaller squares. Two things in one square look like one blob, a blurred patch.
Step 1 of 4
- Coarse grid: two lights land in one square.
- On screen, that reads as one spot.
- Finer grid: more, smaller squares.
- The same two lights now land in separate squares.
A finer tool shows more. It also brings new questions.
Watch out!
Zooming in on a photo does not split a blob. Only smaller squares can.
Try the lab to finish this lesson.