The study of light emitted by the hydrogen atom by Johann Balmer, Johannes Rydbe

Question

The study of light emitted by the hydrogen atom by Johann Balmer, Johannes Rydberg, Niels Bohr, and others revolutionized physics because it revealed that Which statement about the quantum numbers that identify an atomic orbital is not correct? Which transition in a hydrogen atom will cause emission of the shortest wavelength photon? Which of the following photons has the lowest frequency? A proton in a cyclotron has a velocity of 2 xi 10 m/s, which it nearly the speed of light. The uncertainty in the velocity it 1%. What it the minimum uncertainty in the position of the proton in meters? The proton mass is 2 xi 10^-27 kg.

Explanation / Answer

a) Study on light emitted by the hydrogen atom reveled that Energy is quantized.

    Ans = d

b)   ans = b

   Principal quantum number alone cannot identifies the energy of atomic orbital.

Both Principal quantum number n and angular momemtum quantum number l are used to identifiy the energy of atomic orbital.

d) Which photon has lowest frequency ?

   Frequency is inversely proportional to wavelength.

Hence,

   Higher the wavelength, lower the frequency.

Among 5 photons a-e,   photon in C has higher wavelength i.e. 1064 nm.

   Hence,

photon in C has lowest frequency.

Therefore,

ans = c

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