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The "chemical rays" found by him were afterwards called ultraviolet radiation. [ 7 ] [ 8 ] [ 9 ] Some of Ritter's researches were acknowledged as important scientific contributions, but he also claimed the discovery of many phenomena that were not confirmed by other researchers.
In 1903 he developed a filter, Wood's glass, that was opaque to visible light but transparent to both ultraviolet and infrared, and is used in modern-day black lights. [10] He used it for ultraviolet photography but also suggested its use for secret communication. [10] He was also the first person to photograph ultraviolet fluorescence.
1893 – Wilhelm Wien: Wien's displacement law for black-body radiation; 1895 – Wilhelm Röntgen: X-rays; 1896 – Henri Becquerel: Radioactivity; 1896 – Pieter Zeeman: Zeeman effect; 1897 – J. J. Thomson: Electron discovered; 1900 – Max Planck: Formula for black-body radiation – the quanta solution to radiation ultraviolet catastrophe
‘Until recently, only two manuscripts were known to contain the Old Syriac translation of the gospels’ Ancient long-hidden Bible chapter discovered using UV light study Skip to main content
A scientist recently discovered a lost fragment of a manuscript representing one of the earliest translations of the Gospels. Scientists Have Discovered an Ancient Hidden Chapter in the Bible Skip ...
1801 – Johann Ritter discovers ultraviolet radiation from the Sun; 1801 – Thomas Young demonstrates the wave nature of light and the principle of interference [13] 1802 – Gian Domenico Romagnosi, Italian legal scholar, discovers that electricity and magnetism are related by noting that a nearby voltaic pile deflects a magnetic needle. He ...
Ultraviolet radiation, also known as simply UV, is electromagnetic radiation of wavelengths of 10–400 nanometers, shorter than that of visible light, but longer than X-rays. UV radiation is present in sunlight , and constitutes about 10% of the total electromagnetic radiation output from the Sun.
John William Draper (May 5, 1811 – January 4, 1882) was an English scientist, philosopher, physician, chemist, historian and photographer. He is credited with pioneering portrait photography (1839–40) and producing the first detailed photograph of the moon in 1840.