Point 11 of 27 — Lesson 1: Hydrogen Atomic Emission Spectrum and Production of X-RaysQuestion bank: 0 questions (0 with pictures)
11What are X-rays?
X-rays areinvisible electromagnetic waves of very short wavelength (about 10⁻¹¹ to 10⁻⁸ m, i.e. between 0.01 nm and 10 nm), lying in the spectrum between ultraviolet and gamma rays. They were discovered by the German physicist Wilhelm Röntgenin 1895, who called them "X-rays" (X = unknown) because he did not know what they were.
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