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What is the longest wavelength photon that can ionize a hydrogen atom in its ground state ? Specify the type of radiation.

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What is the longest wavelength photon that can ionize a hydrogen atom in its ground state ? Specify the type of radiation.

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Hence, the energy of the incident photon =hv = hc/λ = 13.6eV

λ = (6.6 x 10-34 x 3 x 108/13.6 x 1.6 x 10-19)

= 0.910 x 10-10 m

This radiation is in ultraviolet region.

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