Radiation with wavelength longer than red lights______________?
Correct answer: C. infra red radiation
- A. ultraviolet rays
- B. X-rays
- C. infra red radiation
- D. visible radiation
Explanation
Red light has the longest wavelength in the visible spectrum, so radiation with an even longer wavelength lies in the infrared region. Ultraviolet and X-rays have shorter wavelengths than visible light. The likely mistake is choosing visible radiation by treating red as the end of all radiation rather than only the visible band.
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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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