Mon Prof Augmenté
Light on a Round Ball
A desk lamp shines from the left onto a white ball on a wooden table. The ball looks round because one side catches bright light, the other side grows darker, and a shadow falls on the table.
This picture is part of the full library
Every lesson is open to everyone for 7 days after it is published. This one came out on September 15, 2026: its text stays readable here, and its picture opens with a subscription.
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Age 9: open this week
Browse Age 9
In the picture
- The bright spot on the ball: where the light hits most directly.
- The shaded side of the ball: where the surface turns away from the light.
- The cast shadow on the table: the dark shape made when the ball blocks the light.
Examples
- A shiny apple on a kitchen counter shows a bright spot and a dark side.
- A street lamp makes a long shadow from a bicycle on the pavement.
Key takeaways
- Light usually hits one side of a round object first, leaving the other side darker.
- A cast shadow falls on the surface behind or beside an object, away from the light.
Carry on in the app
Three questions on this lesson. It has left the free week, so its quiz is for subscribers.
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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