Question

a) Determine the maximum wavelength of the photon that hydrogen in the excited state ni = 4 can absorb. The energy of the ground state of hydrogen is −13.6 eV, the speed of light is 2.99792 × 10^8 m/s and Planck’s constant is 6.62607 × 10^−34 J · s. Answer in units of nm.

b) What would be the next smaller wavelength that would work? Answer in units of nm.?

Answer #1

4 a) A hydrogen atom in the ground state absorbs a photon of
wavelength 97.2 nm. What energy level does the electron reach?
b) This excited atom then emits a photon of wavelength 1875.4
nm. What energy level does the electron fall to?

When ultraviolet light with a wavelength of 400 nmfalls on a
certain metal surface, the maximum kinetic energy of the emitted
photoelectrons is 1.10 eV .
What is the maximum kinetic energy K0 of the
photoelectrons when light of wavelength 350 nm falls on the same
surface?
Use h = 6.63×10?34 J?s for Planck's constant
and c = 3.00×108 m/s for the speed of light and
express your answer in electron volts.

The electron in a hydrogen atom falls from an excited energy
level to the ground state in two steps, causing the emission of
photons with wavelengths of 656.5 nm and 121.6 nm (So the in the
first step the 656.5 nm photon is emitted and in the second step
the 121.6 nm photon is emitted). What is the principal quantum
number (ni) of the initial excited energy level from which the
electron falls?

1. a. A photon is absorbed by a hydrogen atom causing an
electron to become excited (nf = 6) from the ground state electron
configuration. What is the energy change of the electron associated
with this transition?
b. After some time in the excited state, the electron falls from
the n = 6 state back to its ground state. What is the change in
energy of the electron associated with this transition?
c. When the electron returns from its excited...

A hydrogen atom is in its third excited state. The atom emits a
1.88E+3nm wavelength photon. Determine the maximum possible orbital
angular momentum of the electron after emission. Express your
answer as multiples of hbar.

(6pts) Can You See a Single Photon? The
wavelength corresponding to the maximum sensitivity
of the human eye is 510 nm, the limit of sensitivity of the
dark-adapted eye has been shown to be correspond to
a 100 ms flash of light of total energy 240 eV. (Little Shop of
Physics- Colorado State University)
1 J = 6.241509 x 1018 eV
a) What is the energy
of a single photon at this wavelength?
b) How many photons
does the flash...

A hydrogen atom is initially at n=2 excited state and then
absorbs energy 2.55 eV. The excited state is unstable, and it tends
to finally return to its ground state.
(a) How many possible wavelengths will be emitted as the atom
returns to its ground state? draw a diagram of energy levels to
illustrate answer
Answer: (number) ________
(b) Calculate the shortest wavelength emitted.
Answer: ________

A hydrogen atom is initially at n=2 excited state and then
absorbs energy 2.86 eV. The excited state is unstable, and it tends
to finally return to its ground state. 8%
(a) How many possible wavelengths will be emitted as the atom
returns to its ground state? (also draw a diagram of energy levels
to illustrate your answer)
Calculate the second shortest wavelength emitted.

A hydrogen atom (Z=1) is in the third excited state. It makes a
transition to a different state, and a photon is either emitted or
absorbed. Answer the following conceptual questions:
What is the quantum number of the third excited state?
When an atom emits a photon, is the final quantum number of the
atom greater than or less than the initial quantum number?
When an atom absorbs a photon, is the final quantum number of
the atom greater than...

A. What is the energy in 10-3 eV of a photon that has
a momentum of 6.13×10−29 kg ⋅ m/s ?
B. What is the energy in 10-9 eV of a photon in a
radio wave from an AM station that has a 1,506 kHz broadcast
frequency?
C. Calculate the frequency in 1020 Hz of a 0.571 MeV
γ-ray photon.
D. A certain molecule oscillates with a frequency of
1.73×1013 Hz. What is the approximate value of
n for a...

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