HS-PS4-4
Evaluate the validity and reliability of claims in published materials of the effects that different frequencies of electromagnetic radiation have when absorbed by matter.
- Archaeology
Laser vision reveals hidden worlds
From discovering ancient ruins to forecasting climate change, the laser mapping technology called lidar is changing many fields of science.
- Space
Radio telescope picks up signals from intelligent life
Astronomers tracked down the source of perytons, mysterious radio bursts. They had at first seemed to emanate from Earth’s atmosphere. Probing now suggests the life forms responsible had a penchant for leftovers.
- Physics
Student radiation experiment goes to space
The Exploration Design Challenge asked students to design shields that would protect astronauts from radiation. Teachers can still involve classes in the challenge.
- Physics
Sending student science to space
Two teachers describe how they worked with the Student Spaceflight Experiments Program to get middle-school scientists excited about research and space.
- Physics
Filter lets in only the right light
Scientists have built a light filter that only permits light coming from one desired angle to pass through. Built from alternating layers of transparent materials, it could help minimize the glare in telescopes and cameras or boost the efficiency of solar cells.
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Kids’ ingenuity honored at Intel ISEF
Young scientists receive awards in international competition.
- Physics
Explainer: What is a laser?
Lasers are the brightest source of light on Earth and produce the purest form of color possible.
