Relatividade, relógios atômicos e a história do tempo

A marcação do tempo é uma das preocupações mais antigas das sociedades humanas. Mas por quê? Vamos entender porque temos razões para desenvolver relógios cada vez mais precisos.

O Canal Primata Falante nos explica e fala sobre experimentos sobre o tempo, podemos ir para o futuro ou para o passado?

Fontes:

‘World’s oldest calendar’ discovered in Scottish field
http://www.bbc.com/news/uk-scotland-north-east-orkney-shetland-23286928

Mesolithic Timelords: A monumental hunter-gatherer ‘calendar’ at Warren Field, Scotland

Mesolithic Timelords: A monumental hunter-gatherer ‘calendar’ at Warren Field, Scotland

One of world’s oldest sun dial dug up in Kings’ Valley, Upper Egypt
https://www.sciencedaily.com/releases/2013/03/130314085052.htm

Why is a minute divided into 60 seconds, an hour into 60 minutes, yet there are only 24 hours in a day?
http://www.scientificamerican.com/article/experts-time-division-days-hours-minutes/

A Walk Through Time
http://www.nist.gov/pml/general/time/early.cfm

Time and Frequency Measuring at NIST: The First 100 years
http://tf.nist.gov/timefreq/general/pdf/1485.pdf

NIST History Measuring Time and Frequency
http://tf.nist.gov/general/museum/847history.htm

The “Atomic Age” of Time Standards
http://web.archive.org/web/20080412040352/
http://physics.nist.gov/GenInt/Time/atomic.html

The International System of Units (SI)
http://www.bipm.org/utils/common/pdf/si_brochure_8_en.pdf

Handbook of Frequency Stability Analysis
http://tf.nist.gov/general/pdf/2220.pdf

Os Relógios e sua Evolução
http://pcdsh01.on.br/histrelog1.htm

Césio:
http://www.cienciaemacao.ufv.br/detalheElemento.php?idElemento=14

SI:
https://en.wikipedia.org/wiki/International_System_of_Units

Atomic clock:
https://en.wikipedia.org/wiki/Atomic_clock

Quartz Clock:
https://en.wikipedia.org/wiki/Quartz_clock

History of Timekeeping Devices:
https://en.wikipedia.org/wiki/History_of_timekeeping_devices#cite_note-154

Canal Primata Falante
https://www.youtube.com/user/mrprimatafalante

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