Earth
Analyze This: Why do atmospheric ‘ghosts’ glow green after red sprites?
Green ghosts — blurs of light that sometimes follow lightning — get their color from oxygen and metals in space dust.
HS-PS4-3
Evaluate the claims, evidence, and reasoning behind the idea that electromagnetic radiation can be described either by a wave model or a particle model, and that for some situations one model is more useful than the other.
More Stories in HS-PS4-3
- Computing
A single chip like this could transmit a world’s worth of data
The internet has a big environmental footprint. But this new type of tech could help reduce the climate impact of computing.
- Earth
Amateur astronomers reveal clues to a mysterious double aurora
Stunning images from citizen scientists show an unusual pattern in ‘Northern Lights.’ They offer clues that may help astronomers better understand a curious red glow.
- Archaeology
Muons reveal the inner worlds of pyramids, volcanoes and more
Tracking these subatomic particles can uncover surprising hidden structures.
- Space
We finally have an image of the black hole at the heart of our galaxy
New observations from the Event Horizon Telescope reveal the chaotic region around the Milky Way’s central black hole, Sagittarius A*, in extreme detail.
- Planets
The long-awaited James Webb Space Telescope has a big to-do list
The James Webb Space Telescope has been in the works for so long that new fields of science have emerged for it to study.
- Physics
Nuclear clocks are nearly here
More precise clocks could improve technologies such as GPS and help scientists test major ideas in science.
- Physics
Light from space has record-breaking energy
Hundreds of newly detected gamma rays hint at environments in the cosmos that accelerate particles to energy extremes.
- Earth
Light levitation might help explore Earth’s ‘ignorosphere’
A toy called a light mill inspired researchers to invent a new way to fly. They’re using light to levitate small nanotube-coated discs.
- Physics
Scientists Say: Radiation
Radiation is the motion of energy through space as waves or particles.
