Astronomers have now observed the radio emission from the neutral hydrogen gas (HI) in a nearby galaxy. Hydrogen gas emits radio emission in a spectral line at a very specific frequency of 1420 MHz.

A theoretical study accepted by Physical Review Letters predicts that gravitational waves, the faint ripples in spacetime ...

Resonantly coupled photonic systems exhibiting dispersive and nontrivial line shapes are attracting growing attention in recent years. In particular, light–matter interactions are of interest owing to ...

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