Mon Prof Augmenté
Light through a microscope
Open to everyone until Tuesday, September 29
To keep it, print it while it is open.
A small lamp shines light upward through a glass slide and two lenses. Each lens bends the light a little more, so the tiny speck on the slide shows up as a big circle of light at the top.
In the picture
- The lamp in the base: it sends a narrow beam of light upward
- The glass slide on the stage: one dark speck sits inside the beam
- The lower lens in its short tube: it bends the beam as the beam widens
- The upper lens at the top: it bends the beam again into a broad circle
Examples
- A magnifying glass focusing sunlight into a bright spot on paper
- Binoculars making a faraway bird look bigger
Key takeaways
- Light travels straight until glass or a lens bends it.
- Two lenses in a row bend the light twice, so the picture gets bigger each time.
Carry on in the app
Three questions on this lesson, to check the idea stuck. Free in the app while the lesson is in the free week.
At least one new illustrated lesson every weekday for your child’s year, with its quiz and a reminder at 6:15 pm.
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