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  1. en.wikipedia.org › wiki › Robert_KochRobert Koch - Wikipedia

    Heinrich Hermann Robert Koch (English: / k ɒ x / KOKH, German: [ˈʁoːbɛʁt ˈkɔx] (); 11 December 1843 – 27 May 1910) was a German physician and microbiologist.As the discoverer of the specific causative agents of deadly infectious diseases including tuberculosis, cholera (though the bacterium itself was discovered by Filippo Pacini in 1854), and anthrax, he is regarded as one of the ...

  2. en.wikipedia.org › wiki › Solar_cellSolar cell - Wikipedia

    A solar cell, or photovoltaic cell, is an electronic device that converts the energy of light directly into electricity by the photovoltaic effect, which is a physical and chemical phenomenon. It is a form of photoelectric cell, defined as a device whose electrical characteristics, such as current , voltage , or resistance , vary when exposed ...

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