#electromagnetism
#electromagnetism

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A new experiment deepens the physics mystery over "big G"

Fundamental forces and constants govern the universe, with electromagnetism well-measured, while gravitation remains poorly understood despite its historical significance.

National Football League

fromDefector

2 months ago

What Time Does "What Time Does The Super Bowl Start?" Start? | Defector

Celebrities flock to the Bay Area for the Super Bowl while a substation electromagnetism theory and errant search timestamps complicate reporting of game start time.

Science

fromWIRED

6 months ago

How Do Metal Detectors Work?

Metal detectors locate metal by generating changing magnetic fields that induce eddy currents and detect the secondary magnetic fields produced by conductive objects.

fromWIRED

8 months ago

What Is the Magnetic Constant and Why Does It Matter?

This means these three values can't be independent; if you know two of them, you can derive the third. How do physicists deal with this? We define the speed of light as exactly 299,792,458 meters per second. (How do we know it's exact? Because we define a meter as the distance light travels in 1/299,792,458 of a second.) Then we measure the magnetic constant () and use that value along with the speed of light to calculate the electric constant ().