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Convert between wavelength, frequency, wavenumber and photon energy

This type of question, asked 3 times: 8 Apr 2024, 28 Jan 2026 S2, 8 Apr 2026 S2. All 3 questions below, oldest first.

Try each one first, then open its answer.

  1. Question 1

    8 Apr 2024

    149
    Wavenumber for a radiation having 5800A˚5800\text{\AA} wavelength is x×10 cm−1x\times 10{\text{ }cm}^{-1}. The value of xx is ____

  2. Question 2

    28 Jan 2026 S2

    34
    The wavelength of photon ' A ' is 400 nm. The frequency of photon ' B ' is 1016 s−110^{16}{\text{ }s}^{- 1}. The wave number of photon ' C ' is 104 cm−110^{4}{\text{ }cm}^{- 1}. The correct order of energy of these photons is :

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  3. Question 3

    8 Apr 2026 S2

    48
    Consider two radiations of wavelengths : 1. λ1=2000Å\lambda_{1} = 2000\text{Å} 2. λ2=6000Å\lambda_{2} = 6000\text{Å} The ratio of the energies of these two radiations (E1E2)\left( \frac{E_{1}}{E_{2}} \right) is ____\_\_\_\_ . (Nearest integer)