Chemistry

Chemistry

Problem

For He+\text{He}^+, a transition takes place from the orbit of radius 105.8 pm to the orbit of radius 26.45 pm. The wavelength (in nm) of the emitted photon during the transition is ________. [Adv. 2023] [Use: Bohr radius, a=52.9 pma = 52.9 \text{ pm}; Rydberg constant, RH=2.2×10−18 JR_H = 2.2 \times 10^{-18} \text{ J}; Planck's constant, h=6.6×10−34 J sh = 6.6 \times 10^{-34} \text{ J s}; Speed of light, c=3×108 m s−1c = 3 \times 10^8 \text{ m s}^{-1}]

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