MCQ
In the above figure $D$ and $E$ respectively represent
  • Absorption line of Balmer series and the ion ization potential of hydrogen
  • B
    Absorption line of Balmer series and the wavelength lesser than lowest of the Lyman series
  • C
    Spectral line of Balmer series and the maximum wavelength of Lyman series
  • D
    Spectral line of Lyman series and the absorption of greater wavelength of limiting value of Paschen series

Answer

Correct option: A.
Absorption line of Balmer series and the ion ization potential of hydrogen
$D$ is excitation of electron from $2$ orbit corresponding to absorption line in Balmer series and $E$ is the energy released to bring the electron from $\infty$ to ground state i.e. ionisation potential.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

Initial pressure and volume of a gas are $P$ and $V$ respectively. First it is expanded isothermally to volume $4 \mathrm{~V}$ and then compressed adiabatically to volume $V$. The final pressure of gas will be
The graph shows the variation of displacement of a particle executing S.H.M. with time. We infer from this graph that

Image

The foundations of dimensional analysis were laid down by
A body of mass $5 \mathrm{~kg}$ is moving with a momentum of $10 \mathrm{~kg}-\mathrm{m} / \mathrm{s}$. A force of $0.2 \mathrm{~N}$ acts on it in the direction of motion of the body for 10 seconds. The increase in its kinetic energy is
The spectrum of a black body at two temperatures $27 \mathrm{C}$ and $327 \mathrm{C}$ is shown in the figure. Let $A$ and $A$ be the areas under the two curves respectively. The value of $\frac{A_2}{A_1}$ is
A spectrum is formed by a prism of dispersive power ' $\omega$ '. If the angle of deviation is ' $\delta$ ', then the angular dispersion is
A spring of force constant $k$ is cut into two pieces such that one piece is double the length of the other. Then the long piece will have a force constant of
A monoatomic gas $(\gamma=5 / 3)$ is suddenly compressed to $\frac{1}{8}$ of its original volume adiabatically, then the pressure of the gas will change to
Density of substance at $0^{\circ} \mathrm{C}$ is $10 \mathrm{gm} / \mathrm{cc}$ and at $100^{\circ} \mathrm{C}$, its density is $9.7 \mathrm{gm} / \mathrm{cc}$. The coefficient of linear expansion of the substance will be
Work function of a metal is $2.51 \mathrm{eV}$. lts threshold frequency is