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The first fractions of a second after the Big Bang

A great description of the Planck mission to study the first seconds of the universe which we can now see as the cosmic microwave background.

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Hits: 1913

Diffraction of light

Historical background and online tutorials on diffraction in which you can vary wavelength and aperture width, and see the results as wave fronts, and as an intensity graph. Explanations include the ...

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Hits: 3151

Fowler's Physics

Various applets allowing results to be taken for demonstration purposes.

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Cosmic Background Radiation

A uniform background radiation in the microwave region of the spectrum is observed in all directions in the sky. It shows the wavelength dependence of a "black body" radiator at about 3 Kelvins ...

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Hits: 2973

Secrets of the early universe

Read how satellite observations of cosmic microwave background can tell us a lot about how the universe formed.

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Hits: 1327

Line Rider

A fun toy that lets you build a sledge run and then test it out. You'll need a good feel for the laws of motion to get results!

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Hits: 4541

A Polarizing Discovery About the Big Bang!

Minutephysics looks at how polarised light in the cosmic microwave background (CMB) gave rise to the discovery of gravitational waves.

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Hits: 731


Catch up with the latest news, videos and info on the Planck mission, which is studying the Cosmic Microwave Background – the relic radiation from the Big Bang.

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The End of My Latin

Kaufmann's experimental results on deflection of electrons in an electromagnetic field favoured Abraham's theory, not Einstein and Lorentz, but were eventually proved wrong.

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Hits: 2313

Arno A. Penzias

Arno A. Penzias (1933 - ) received the Nobel Prize for Physics in 1978 along with Robert Woodrow Wilson for their discovery of cosmic microwave background radiation.

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