A red apple meets a green light…

The apple is happy and red. Now a green light clicks on. What will the apple do?

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A red apple throws red light back to your eyes.

apple's red green lamp
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But the apple can only throw back red — nothing else.

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Tap to change the lamp's color and watch the apple!

Tap the lamp — slide it from red light toward green.

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Now only the green light shines on the red apple. Will it stay red or go dark?

Tap your guess!