electromagnetic spectrum

While sitting at a table, one child points a small transmitter at a vacuum-seal container that has a key finder inside, and another child holds a smartphone up to the other side of the container.

Radio Explorers: Messages from Space

Learners investigate the differences between sound and radio waves in a partial vacuum.

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An adult and a child holds a metal baking sheet above the antennae of a Wi-Fi router on a block of wood, placed on a table. Another child holds a shell of tinfoil around a block of wood placed apart from the first block.

Radio Explorers: Wi-Fi Detective

Learners explore how to manipulate the radio waves from a Wi-Fi router using household materials and an app to measure Wi-Fi signal strength.

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Two children are seated at a table spread with large cards that depict writing and various radio technologies. Both children are holding a card in each hand and smiling as they read the cards.

Radio Futures: You Decide

Learns discover how their own values and the values of other can shape the development and use of future radio technologies.

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Two gallon-sized paint cans–one made out of clear plastic and the other metal– are side by side on a table. Behind them, two youths are seated at the table. Together they place a handheld, hand crank radio with a long antenna into the plastic paint can.

Radio Explorers: Radio Silence

Learners compare and contrast how a variety of materials can block radio waves.

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A family looks at an image through a blue filter

Exploring the Universe: Filtered Light

In this activity, learners discover how colored filters can help reveal more about an image and we can use light and filters to learn more about an object.

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