Question: 11. please help 11. An electron drops from one energy level to another within an excited hydrogen atom producing a photon with a frequency of

11. please help

11. An electron drops from one energy level to another within an excited hydrogen atom producing a photon with a frequency of 2.5 x 1015 Hz. The wavelength of this photon is 0 7.5 x 10-23 m 0 8.3 x 105 m 0 1.2 x 107 m 1.8 x 1011 m

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