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Problem- Running at night, you look into the sky and you are struck in the eye by a photon. The photon was emitted sommewhere in deep space, long ago by a helium atom undergoing a downward transition from 3p to 2s state. Determine the wavelength, energy and frequency of this photon.

Express your answer to two significant figures and include the appropriate units.

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Category:- Chemistry
Reference No.:- M91228305

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