Why is Relativity Hard? | Special Relativity Chapter 1


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We must reason in natural philosophy not from what we hope or even expect but from what we perceive. ~ Humphry Davy - 1778 to 1829

Valid criticism does you a favor. - Carl Sagan 1934 to 1996 Astronomer


Why is Relativity Hard? | Special Relativity Chapter 1

Before watching Video, Check Out…

List of inventors!
List of inventors!

Min Chueh Chang (1908–1991) together with Gregory Goodwin Pincus (1903–1967) USA/China – Combined oral contraceptive pill.

Jacques E. Brandenberger (1872–1954) Switzerland – Cellophane.

Johann Gutenberg (c. 1390s–1468) Germany – movable type printing press.

Konstantin Tsiolkovsky (1857–1935) Russia – spaceflight.

Robert Watson-Watt (1892–1973) Scotland – microwave radar.

Sir William Siemens (1823–1883) Germany – regenerative furnace.

John Blenkinsop (1783–1831) UK – Blenkinsop rack railway system.

Heike Kamerlingh Onnes (1853–1926) Netherlands – liquid helium.

Alberto Santos-Dumont (1873–1932) Brazil – non-rigid airship and airplane.

Igor Gorynin (born 1926) Russia – weldable titanium alloys high strength aluminium alloys radiation-hardened steels.

Thomas Wedgwood (1771–1805) UK – first (not permanent) photograph.

Émile Baudot (1845-1903) France - Baudot code.

Yi Xing (683–727) China – astronomical clock.

Bryan Donkin (1768–1855) UK – print industry composition roller.

Robert Metcalfe (born 1946) USA – Ethernet.

Fujio Masuoka (1943–) Japan – Flash memory.

Alexander Prokhorov (1916–2002) Russia – co-inventor of laser and maser.

Nicolas Appert (1749–1841) France – canning (food preservation) using glass bottles see also Peter Durand.

Gerhard Fischer (1899–1988) Germany/USA – hand-held metal detector.

Oleg Losev (1903–1942) Russia – light-emitting diode crystadine.


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Brilliant Quotes By Famous And Awesome Scientists!

There are many ways of knocking electrons out of atoms. The simplest is to rub two surfaces together. ~ Fred Hoyle 1915 to 2001

Progress is made by trial and failure; the failures are generally a hundred times more numerous than the successes ; yet they are usually left unchronicled. - William Ramsay 1852 to 1916 Chemist

In practical applications we are concerned only with comparatively small numbers; only stellar astronomy and atomic physics deal with ‘large’ numbers and they have very little more practical importance as yet than the most abstract pure mathematics. ~ G. H. Hardy 1877 – 1947 - Mathematician

No two electrons in the same state? That is why atoms are so unnecessarily big and why metal and stone are so bulky. (Explaining that atoms are as large as they are because of Wolfgang Pauli’s Principle.) ~ Paul Ehrenfest 1880 – 1933

The ultimate truths of mathematics then cannot be established by any experimental proof that the deductions from them are true; since the supposed experimental proof takes them for granted. ~ Herbert Spencer 1885 – 1977 - Philospher

Dr. Ikemoto repeatedly told me that we should not perform research that simply reproduced somebody else’s results. Rather we should do something unique and new. ~ Shinya Yamanaka 1962 to Present - Stem Cell Biologist

I believe that thirty million of these animalcules together would not take up as much room or be as big as a coarse grain of sand. ~ Antonie van Leeuwenhoek 1632 to 1723 - Biologist


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