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Asked in Premeth Test 17 — Atomic Spectra (physics)

X-rays were first discovered by:

Correct answer: B. Rontgen

  • A. Rydberg
  • B. Rontgen
  • C. Planck
  • D. None of the above

Explanation

X-rays were first discovered in 1895 accidentally by Rontgen. Rontgen reported the discovery after seven weeks of assiduous work during which he had studied the properties of this new type of radiation able to go through screens of notable thickness. He named them X-rays to underline the fact that their nature was unknown.

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About Atomic Spectra

Atoms emit or absorb light at specific wavelengths because electrons occupy quantized energy levels and change levels by absorbing or releasing photons. The topic covers emission and absorption spectra, spectral series, hydrogen’s line spectrum, energy-level transitions, and the relation between wavelength, frequency and photon energy.

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