Who in 1801 discovered the ultraviolet radiation?

Benjamin Franklin

William Herschel

Johann Wilhelm Ritter

John Tyndall

UV radiation was discovered in 1801 when the German physicist Johann Wilhelm Ritter observed that invisible rays just beyond the violet end of the visible spectrum darkened silver chloride-soaked paper more quickly than violet light itself.

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the United States

20%

75%

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28%

48%

20%

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22%

45%

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27%

44%

14%

730

Germany

50%

40%

What is the name of this butterfly species?

Goldhair moth

Neopalpa donaldtrumpi

Unsightly butterfly

Huskhead neopalda

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