Q155 / 160 · AP EAMCET 2016 · Physics

Choose the correct sequence of the radiation sources in increasing order of the wavelength of electromagnetic waves produced by them.

  • A
    X-ray tube, Magnetron valve, Radioactive source, Sodium lamp
  • Correct answer
    B
    Radioactive source, X-ray tube, Sodium lamp, Magnetron valve
  • C
    X-ray tube, Magnetron valve, Sodium lamp, Radioactive source
  • D
    Magnetron valve, Sodium lamp, X-ray tube, Radioactive source

Solution

The correct sequence of the radiation source in increasing order of the wavelength is Radioactive source $\left(\sim 10^{-12} \mathrm{~m}\right) \rightarrow$ X-ray tube $\left(\sim 10^{-10} \mathrm{~m}\right) \rightarrow$ Sodium lamp $\left(\sim 10^{-9} \mathrm{~m}\right) \rightarrow$ Magnetron value $\left(\sim 10^{-3} \mathrm{~m}\right)$.

Hence, the correct answer is option: 'B'.

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