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

$6563 \overset{o}{A}, 1216 \overset{o}{A}, 9546 \overset{o}{A}, 4861 \overset{o}{A}$ and $1026 \overset{o}{A}$ .

Important Questions on Atom, Origin of Spectra : Bohr's Theory 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 32

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

$6563 \overset{o}{A}, 1216 \overset{o}{A}, 9546 \overset{o}{A}, 4861 \overset{o}{A}$ and $1026 \overset{o}{A}$ .

MEDIUM

12th ICSE

IMPORTANT

ISC Physics Class 12, Part-2>Chapter 13 - Atom, Origin of Spectra : Bohr's Theory of Hydrogen Atom>QUESTIONS>Q 33

The energy of an electron in the first Bohr orbit of an atom is

- 27.2 e V

. What will be it's energy in the third Bohr orbit?

EASY

12th ICSE

IMPORTANT

ISC Physics Class 12, Part-2>Chapter 13 - Atom, Origin of Spectra : Bohr's Theory of Hydrogen Atom>QUESTIONS>Q 34

Energies of the first three energy-levels of hydrogen atom are

- 13.6, - 3.4

and

- 1.5 e V

respectively. What should be the limits of energy of the electrons striking (and exciting) hydrogen atoms so that only one line is obtained in the hydrogen spectrum?

EASY

12th ICSE

IMPORTANT

ISC Physics Class 12, Part-2>Chapter 13 - Atom, Origin of Spectra : Bohr's Theory of Hydrogen Atom>QUESTIONS>Q 35

What should be the minimum energy of an electron exciting the hydrogen atom so that three spectral lines are observed in the hydrogen spectrum?

MEDIUM

12th ICSE

IMPORTANT

ISC Physics Class 12, Part-2>Chapter 13 - Atom, Origin of Spectra : Bohr's Theory of Hydrogen Atom>QUESTIONS>Q 36

Wavelengths of the first lines of the Lyman series, Paschen series and Balmer series in hydrogen spectrum are denoted by