MEDIUM
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Find the shortest wavelength in Paschen series, if the longest wavelength in Balmer series is 6563 Å.

Important Questions on Atoms

HARD
Physics>Modern Physics>Atoms>Atomic Spectra
Explain the different types of spectral series.
MEDIUM
Physics>Modern Physics>Atoms>Atomic Spectra
Hydrogen (1H1), Deuterium (1H2), singly ionised Helium (2He4)+ and doubly ionised lithium (3Li6)++ all have one electron around the nucleus. Consider an electron transition from n=2 to n=1. If the wave lengths of emitted radiation are λ 1 ,  λ 2 ,  λ 3  and λ 4  respectively then approximately which one of the following is correct ?
EASY
Physics>Modern Physics>Atoms>Atomic Spectra
The wavelength of the photon emitted by a hydrogen atom when an electron makes a transition from n=2 to n=1 state is:
EASY
Physics>Modern Physics>Atoms>Atomic Spectra
The atomic hydrogen emits a line spectrum consisting of various series. Which series of hydrogen atomic spectra is lying in the visible region?
MEDIUM
Physics>Modern Physics>Atoms>Atomic Spectra
Hydrogen atom in its ground state is excited by a monochromatic light of energy 13.06eV. The longest wavelength among the spectral lines is (Ionization energy of hydrogen atom is 13.6eV)
EASY
Physics>Modern Physics>Atoms>Atomic Spectra
The first three spectral lines of H-atom in the Balmer series are given λ1,λ2,λ3 considering the Bohr atomic model, the wave lengths of first and third spectral lines λ1λ3 are related by a factor of approximately x ×10-1. The value of x, to the nearest integer, is ________.
MEDIUM
Physics>Modern Physics>Atoms>Atomic Spectra
According to Bohr atom model, in which of the following transitions will the frequency be maximum?
MEDIUM
Physics>Modern Physics>Atoms>Atomic Spectra
X different wavelength may be observed in the spectrum from a hydrogen sample if the atoms are excited to states with principal quantum number n=6? The value of X is
HARD
Physics>Modern Physics>Atoms>Atomic Spectra
If R is the Rydberg constant in cm-1, then hydrogen atom does not emit any radiation of wavelength in the range of
HARD
Physics>Modern Physics>Atoms>Atomic Spectra
The Hitomi satellite recently observed the Lyman alpha emission line (n=2 to n=1) of hydrogen-like iron ion (atomic number of iron is 26) from the Perseus galaxy cluster. The wavelength of the line is closest to
EASY
Physics>Modern Physics>Atoms>Atomic Spectra
In the discharge tube as the density of atom increases, the intensity of spectral lines
MEDIUM
Physics>Modern Physics>Atoms>Atomic Spectra
The energy required to ionise a hydrogen like ion in its ground state is 9 Rydbergs. What is the wavelength of the radiation emitted when the electron in this ion jumps from the second excited state to the ground state?
MEDIUM
Physics>Modern Physics>Atoms>Atomic Spectra

The spectral line corresponding to a transition of an electron in H-atom the first excited state to the ground state would appear in the

EASY
Physics>Modern Physics>Atoms>Atomic Spectra
If an electron is moving in the nth  orbit of the hydrogen atom, then its velocity (vn) for the nth  orbit is given as:
MEDIUM
Physics>Modern Physics>Atoms>Atomic Spectra
If R is Rydberg constant then, the shortest wavelength of the Balmer series of the hydrogen atom is:
EASY
Physics>Modern Physics>Atoms>Atomic Spectra
The spectrum formed by an ordinary tubelight is a/an
EASY
Physics>Modern Physics>Atoms>Atomic Spectra
The wavelength of radiation emitted when an electron jumps from 5th  excited state to 3rd excited state of a hydrogen atom is ________. Given. Planck's constant =6.625×10-34 J s
MEDIUM
Physics>Modern Physics>Atoms>Atomic Spectra
The shortest wave lengths of Paschen, Balmer and Lyman series are in the ratio
HARD
Physics>Modern Physics>Atoms>Atomic Spectra
In hydrogen spectrum, Lα line arises due to transition of electron from the orbit n=3 to the orbit n=2. In the spectrum of singly ionized helium, there is a line having the same wavelength as that of the Lα line of hydrogen. This is due to the transition of the electron from the orbit ______ to ________
EASY
Physics>Modern Physics>Atoms>Atomic Spectra
An electron from various excited states of hydrogen atom emit radiation to come to the ground state. Let λn, λg be the de Broglie wavelength of the electron in the nth state and the ground state respectively. Let ∧n be the wavelength of the emitted photon in the transition from the nth state to the ground state. For large n, (A, B are constants)