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1. "A photon is emitted by a hydrogen atom. If the electron emitted this photon made a transition from the n=6 energy level to the n=1 energy level, what is the energy of the photon?"
2. "An electron is travelling with constant speed of 2.5 x 10^8 m/s. By initially calculating the relativistic momentum observed by a stationary spectator, find the period associated with the electrons wave nature, observed by the stationary observer"
Help pls
2. "An electron is travelling with constant speed of 2.5 x 10^8 m/s. By initially calculating the relativistic momentum observed by a stationary spectator, find the period associated with the electrons wave nature, observed by the stationary observer"
Help pls