Quotes About Physics

In the beginning, there was physics. Physics describes how matter, energy, space, and time behave and interact with one another. The interplay of these characters in our cosmic drama underlies all biological and chemical phenomena. Hence everything fundamental and familiar to us earthlings begins with, and rests upon, the laws of physics. When we apply these laws to astronomical settings, we deal with physics writ large, which we call astrophysics.

And behold the greatest mystery of them all: an unopened can of diet Pepsi floats in water while an unopened can of regular Pepsi sinks.

A bullet fired level from a gun will hit ground at same time as a bullet dropped from the same height. Do the Physics.

Dark matter is a mysterious substance that has gravity but does not interact with light in any known way.

If all mass has gravity, does all gravity have mass? We don't know. Maybe there's nothing wrong with the matter, and it's the gravity we don't understand.

If all mass has gravity, does all gravity have mass? We don't know.

night and day, a hundred billion neutrinos from the Sun pass through each square inch of your body, every second, without a trace of interaction with your body's atoms.

Without a doubt, Einstein's greatest blunder was having declared that lambda was his greatest blunder.

Bosons, by the way, are named for the Indian scientist Satyendra Nath Bose.

Until Sir Isaac Newton wrote down the universal law of gravitation, nobody had any reason to presume that the laws of physics at home were the same as everywhere else in the universe. Earth had earthly things going on and the heavens had heavenly things going on.

That is, cosmic dark matter enjoys about six times the mass of all the visible matter.

Quarks are quirky beasts. Unlike protons, each with an electric charge of +1, and electrons, with a charge of –1, quarks have fractional charges that come in thirds.

A modern example of this stunning knowledge of nature that Einstein has gifted us, comes from 2016, when gravitational waves were discovered by a specially designed observatory tuned for just this purpose.

When something glows from being heated, it emits light in all parts of the spectrum, but will always peak somewhere.

These largely empty volumes of space—the far-rural regions of each galaxy—contain too little visible matter to explain the anomalously high orbital speeds of the tracers.

You could, in principle, perform this stunt if you managed to let forth a powerful and sustained exhaust of flatulence.

The German physicist Max Planck, after whom these unimaginably small quantities are named, introduced the idea of quantized energy in 1900 and is generally credited as the father of quantum mechanics.

Physics is the only profession in which prophecy is not only accurate but routine.

The ordinary photon is a member of the boson family.

Si la velocidad orbital de la Tierra fuera mayor que la raíz cuadrada del doble de su velocidad actual, nuestro planeta alcanzaría una «velocidad de escape» y, como cabe suponer, escaparía del sistema solar. Podemos

The word "lepton" derives from the Greek leptos, meaning "light" or "small.

During the quark–lepton era the universe was dense enough for the average separation between unattached quarks to rival the separation between attached quarks.

Around the world, varying belief systems lead to political differences that are not always resolved peacefully. The power and beauty of physical laws is that they apply everywhere, whether or not you choose to believe in them. In other words, after the laws of physics, everything else is opinion.

This general flattening of objects that rotate is why Earth's pole-to-pole diameter is smaller than its diameter at the equator. Not by much: three-tenths of one percent—about twenty-six miles.