Heat treatment of muscular pain involves radiation of a wavelength of about 900 nm. Which spectral line of the H atom is suitable for this?

(Rydberg constant \({\mathrm{R}}_{\mathrm{H}}={10}^{5}{\mathrm{cm}}^{-1},\mathrm{h}=6.6\times {10}^{-34}\mathrm{Js},\mathrm{c}=3\times {10}^{8}\mathrm{m}/\mathrm{s}\))

[JEE Main 2025, 23 Jan (Shift 1)]

Question

Heat treatment of muscular pain involves radiation of a wavelength of about 900 nm. Which spectral line of the H atom is suitable for this?

(Rydberg constant \({\mathrm{R}}_{\mathrm{H}}={10}^{5}{\mathrm{cm}}^{-1},\mathrm{h}=6.6\times {10}^{-34}\mathrm{Js},\mathrm{c}=3\times {10}^{8}\mathrm{m}/\mathrm{s}\))

[JEE Main 2025, 23 Jan (Shift 1)]

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