Oct 12, 2013


Guest Question by Saswat Panigrahi | contribute questions

Some of his many achievements include:
- discovered 'eddy currents'
- devised a testing method to to tell the shape of a mirror
- made an early measurement of the speed of light
- named the 'gyroscope'

His most famous invention was an eponymous device, the first simple proof of an astronomical west-to-east phenomenon, which Google paid tribute to in September 2013, to mark his 194th birthday.

Name him and the device.

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This day last year: Q.743


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