𝟕 𝐖𝐚𝐲𝐬 𝐢𝐧 𝐄𝐢𝐧𝐬𝐭𝐞𝐢𝐧'𝐬 𝐓𝐡𝐞𝐨𝐫𝐲 𝐨𝐟 𝐑𝐞𝐥𝐚𝐭𝐢𝐯𝐢𝐭𝐲 𝐢𝐧 𝐑𝐞𝐚𝐥 𝐋𝐢𝐟𝐞

𝐄𝐢𝐧𝐬𝐭𝐞𝐢𝐧'𝐬 𝐓𝐡𝐞𝐨𝐫𝐲 𝐨𝐟 𝐑𝐞𝐥𝐚𝐭𝐢𝐯𝐢𝐭𝐲 𝐢𝐧 𝐑𝐞𝐚𝐥 𝐋𝐢𝐟𝐞

 𝟏. 𝐏𝐫𝐨𝐟𝐨𝐮𝐧𝐝 𝐈𝐦𝐩𝐥𝐢𝐜𝐚𝐭𝐢𝐨𝐧𝐬

Relativity is one of the most famous scientific theories of the 20th century, but how well does it explain the things we see in our daily lives ? Formulated by Albert Einstein in 1905, the theory of relativity is the notion that the laws of physics are the same everywhere. The theory explains the behavior of objects in space and time, and it can be used to predict everything from the existence of black holes, to light bending due to gravity, to the behavior of the planet Mercury in its orbit.

Theory is deeply simple. 1st there is no absolute frame of reference. Every time you measure an object's velocity or its momentum, how it experiences time or it's always in relation to some else. 2nd the speed of light is  same no matter who measures it or how fast the person measuring it's going. 3rd nothing can go faster than light. 

The implications of Einstein's most famous theory are profound. If the speed of light is always the same, it means that an astronaut going very fast relative to the Earth will measure the seconds ticking by slower than an Earthbound observer will — time essentially slows down for the astronaut a phenomenon called time delation.

Any object in a big gravity field is accelerating, so it will also experience time dilation. To the astronaut on board, all would seem normal, the mass of the spaceship would appear to increase from the point of view of people on Earth. 

But you don't necessarily need a spaceship  zooming at the near speed of light to see relativistic effects. In fact, there are several instances of relativity that we can see in our daily lives, and even technologies we use today that demonstrate that Einstein was right. Here are some ways we see relativity in action.

𝟐. 𝐄𝐥𝐞𝐜𝐭𝐫𝐨𝐦𝐚𝐠𝐧𝐞𝐭𝐬

Magnetism is a relativistic effect If you take a loop of wire and move it     through a magnetic field, you generate an electric current.

When a direct current of electric charge flows through a wire, electrons are drifting through the material. Ordinarily the wire would seem electrically neutral, with no net positive or negative charge. if you put another wire next to it with a DC current, the wires attract or repel each other, depending on which direction the current is moving. 

Assuming the currents are moving in the same direction, the electrons in the first wire see the electrons in the second wire as motionless. Otherwise, from the electrons' perspective, the protons in both wires look like they are moving. Because of the relativistic length contraction, they appear to be more closely spaced, so there's more +ve charge per length of wire than -ve charge. Since like charges repel, the two wires also repel.

𝟑. 𝐆𝐨𝐥𝐝'𝐬 𝐘𝐞𝐥𝐥𝐨𝐰 𝐂𝐨𝐥𝐨𝐫 𝐏𝐡𝐞𝐧𝐨𝐦𝐞𝐧𝐚 

              

Most metals are shiny because the electrons in the atoms jump from different energy levels or orbitals. Some photons that hit the metal get absorbed and re-emitted,  Most visible light, though, just gets reflected.

Gold is a heavy metal, so the inner electrons are moving fast enough that relativistic mass increase is significant, as well as the length contraction. As a result, the electrons are spinning around the nucleus in shorter paths, with more momentum.

White light is a mix of all the colors of rainbow, but in gold's case, when light gets absorbed and re-emitted the wavelengths are usually longer. That means the mix of light waves we see tends to have less blue and violet in it. This makes gold appear yellowish in color since yellow, orange and red light is a longer wavelength than blue.

𝟰. 𝗚𝗼𝗹𝗱 𝗱𝗼𝗲𝘀 𝗻𝗼𝘁 𝗖𝗼𝗿𝗿𝗼𝗱𝗲 𝗘𝗮𝘀𝗶𝗹𝘆      

 

The relativistic effect on gold's electrons is also one reason that the metal doesn't corrode or react with anything else easily.

Goldhas only one electron in its outer shell, but it still is not as reactive as calcium or lithium. Instead, the electrons in gold, being "heavier" than they should be, are all held closer to the atomic nucleus. This means that the outermost electron isn't likely to be in a place where it can react with anything at all — it's just as likely to be among its fellow electrons that are close to the nucleus.

5.  Mercury is to Liquid 

Similar to gold ,mercury is also a heavy atom, with electrons held close to the nucleus because of their speed and consequent mass increase. With mercury, the bonds between its atoms are weak, so mercury melts at lower temperatures and is typically a liquid when we see it.

6.  Old  TVs   !!!

Just a few years back most of the televisions and monitors had cathode ray tube screens. A cathode ray tube works by firing electrons at a phosphor surface with big magnet. The electrons fired out to make the picture move at up to 30 percent the speed of light. Relative effects are noticeable, and when manufacturers shaped magnets, they had to take those effects in to account.

𝟕. 𝐋𝐢𝐠𝐡𝐭

If Isaac Newton had been right in assuming that there is an absolute rest frame, we would have to come up with a different explanation for light, because it wouldn't happen at all.

Not only magnetism not exist but light also not exist, because relativity requires some changes in EMF move at normal speed. If relativity didn't enforce these requirement changes in electric fields would be-communicated-instantaneously-instead-of-through-electromagnetic waves and both magnetism and light would be unnecessary.