X-rays are diffracted from _
Correct answer: B. crystal
- A. mirror
- B. crystal
- C. gas molecules
- D. all of these
Explanation
X-rays are diffracted from crystals because of their regularly arranged atoms or ions in a lattice structure. This ordered arrangement enables X-rays to scatter and form distinct diffraction patterns. Mirrors and gas molecules do not have the periodic atomic structure necessary for X-ray diffraction. Therefore, crystals are the only correct choice for diffraction of X-rays, which is extensively used in X-ray crystallography to analyze material structures.
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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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