quantum tunnelling energy barriers radioactive decay stellar fusion

Quantum particles can cross barriers they should not have enough energy to cross

In quantum physics, a particle can sometimes appear on the other side of an energy barrier even when it does not have enough energy to cross it in ordinary physics. This effect, called quantum tunneling, helps make radioactive decay and fusion inside stars possible.

Coal freed factories from the need to stand beside rivers

Early factories powered by waterwheels had to be located near rivers with suitable flows. Steam engines fueled by coal allowed manufacturers to generate mechanical power in many more places. Factories could move closer to workers, customers and transport networks, helping reshape the geography of industrial cities.

Spices did not hide spoiled meat

Medieval European cooks used spices for flavor, not to cover up spoiled meat. Spices were costly and less effective at preserving food than salt, smoking, pickling, or drying. Cookbooks advised adding them near the end of cooking, too late to preserve the food.

Like this? There’s a whole feed of it. Replace empty scrolling with things worth knowing.

Download Hence for free

quantum tunnelling energy barriers radioactive decay stellar fusion

Quantum particles can cross barriers they should not have enough energy to cross

Keep exploring