EASY
12th ICSE
IMPORTANT
Earn 100

Name a series of hydrogen spectrum which is obtained in infrared region. Write the general formula expressing the wavelength of the series.

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

EASY
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 13 - Atom, Origin of Spectra : Bohr's Theory of Hydrogen Atom>QUESTIONS>Q 26
Write the unit of Rydberg's constant.
EASY
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 13 - Atom, Origin of Spectra : Bohr's Theory of Hydrogen Atom>QUESTIONS>Q 27
In a sample of hydrogen gas, most of its atoms are in the energy level n=1. On passing visible light through this gas, some spectral lines are absorbed. Lines of which series (Lyman or Balmer) are absorbed maximum and why?
EASY
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 13 - Atom, Origin of Spectra : Bohr's Theory of Hydrogen Atom>QUESTIONS>Q 28
Only certain definite lines are found in the atomic spectrum of substances, why?
EASY
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 13 - Atom, Origin of Spectra : Bohr's Theory of Hydrogen Atom>QUESTIONS>Q 29
What will be the angular momentum of electron in the second orbit of Bohr's model of hydrogen atom?
MEDIUM
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 13 - Atom, Origin of Spectra : Bohr's Theory of Hydrogen Atom>QUESTIONS>Q 30
The radius of the first electron-orbit in hydrogen atom is r0. What will be the radius of the second orbit? What of the second orbit of singly-ionised helium atom?
MEDIUM
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 13 - Atom, Origin of Spectra : Bohr's Theory of Hydrogen Atom>QUESTIONS>Q 31
The electron energy in the first orbit of hydrogen atom is -E0. What will it be in singly-ionised helium atom?
MEDIUM
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 13 - Atom, Origin of Spectra : Bohr's Theory of Hydrogen Atom>QUESTIONS>Q 32

The wavelengths of some of the spectral lines obtained in hydrogen spectrum are given below. Select out the wavelengths corresponding to Lyman series.

6563 Ao, 1216 Ao, 9546 Ao, 4861 Ao and 1026 Ao.

MEDIUM
12th ICSE
IMPORTANT
ISC Physics Class 12, Part-2>Chapter 13 - Atom, Origin of Spectra : Bohr's Theory of Hydrogen Atom>QUESTIONS>Q 32

The wavelengths of some of the spectral lines obtained in hydrogen spectrum are given below. Select out the wavelengths corresponding to Paschen series.

6563 Ao, 1216 Ao, 9546 Ao, 4861 Ao and 1026 Ao.