Nikolai Pylchykov

Mykola Dmytroych Pylchykov (, 21 May 1857, Kharkiv, Russian Empire (present-day Kharkiv, Ukraine) – 19 May 1908, Kharkiv, Russian Empire) was a physicist, inventor, and geologist in the Russian Empire. He is known for the discovery of the photovoltaic effect, new properties of X-rays, and ways to control various mechanisms of the radio provided a basis of radio control.

Mykola Dmytroych Pylchykov was a son of Dmytro Pylchykov, one of members of the Brotherhood of Saints Cyril and Methodius. Father was a Ukrainian patriot, public and cultural figure, taught history and political economy in the Poltava Cadet Corps. Under the guidance of his father, Mykola learned 7 languages, including Ukrainian and Polish literature, and immediately before entering the Poltava gymnasium, he also studied Russian and was admitted to the 4th grade.

Pylchykov was a member of the Toulouse Academy of Sciences.

He played the violin, was engaged in painting, knew 7 languages, wrote and published poems in the Ukrainian language in the magazine "Skladka" under the pseudonym M.P., because until 1905 the Ukrainian printed language was banned by the Russian Empire in Ukraine.