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Some energy levels of a molecule are shown in the figure. The ratio of the wavelengths r=λ1λ2 is given by :

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Important Questions on Atom, Origin of Spectra : Bohr's Theory of Hydrogen Atom

HARD
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 13 - Atom, Origin of Spectra : Bohr's Theory of Hydrogen Atom>For DIFFERENT COMPETITIVE EXAMINATIONS>Q 16
The radiation corresponding to 3→2 transition of hydrogen atom falls on a metal surface to produce photoelectrons. These electrons are made to enter a magnetic field of 3×10-4 T . If the radius of the largest circular path followed by these electrons is 10.0mm, the work function of the metal is close to
EASY
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 13 - Atom, Origin of Spectra : Bohr's Theory of Hydrogen Atom>For DIFFERENT COMPETITIVE EXAMINATIONS>Q 17
The ratio of wavelength of the last line of Balmer series and the last line Lyman series is:
EASY
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 13 - Atom, Origin of Spectra : Bohr's Theory of Hydrogen Atom>For DIFFERENT COMPETITIVE EXAMINATIONS>Q 18
The wavelength of the first spectral line in the Balmer series of hydrogen atom is 6561 A∘.The wavelength of the second spectral line in the Balmer series of singly-ionized helium atom is:
EASY
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 13 - Atom, Origin of Spectra : Bohr's Theory of Hydrogen Atom>For DIFFERENT COMPETITIVE EXAMINATIONS>Q 19
If an electron in a hydrogen atom jumps from the 3rd orbit to the 2nd orbit, it emits a photon of wavelength λ. When it jumps from the 4th orbit to the 3rd orbit, the corresponding wavelength of the photon will be
EASY
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 13 - Atom, Origin of Spectra : Bohr's Theory of Hydrogen Atom>For DIFFERENT COMPETITIVE EXAMINATIONS>Q 20
Given the value of Rydberg's constant is 107 m-1 , the wave number of the last line of the Balmer's series in hydrogen spectrum will be:
EASY
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 13 - Atom, Origin of Spectra : Bohr's Theory of Hydrogen Atom>For DIFFERENT COMPETITIVE EXAMINATIONS>Q 21
The largest wavelength in the ultraviolet region of the hydrogen spectrum is 122 nm. The smallest wavelength in the  infrared region of the hydrogen spectrum (to the nearest integer) is:
EASY
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 13 - Atom, Origin of Spectra : Bohr's Theory of Hydrogen Atom>For DIFFERENT COMPETITIVE EXAMINATIONS>Q 22
The ratio of kinetic energy to the total energy of an electron in a Bohr orbit of the hydrogen atom, is?
MEDIUM
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 13 - Atom, Origin of Spectra : Bohr's Theory of Hydrogen Atom>For DIFFERENT COMPETITIVE EXAMINATIONS>Q 23
If the series limit frequency of the Lyman series is νL, then the series limit frequency of the Pfund series is :