Emission and Absorption Spectrum

Franck-Hertz experiment is performed using an accelerating potential of $8.0 \mathrm{V}$ in a tube containing mercury vapour. The energy levels of mercury are shown in the figure. Assume the mercury atoms to be initially in their ground states.

________________ $10.4\mathrm{eV}$

________________  $8.8\mathrm{eV}$

________________  $6.7\mathrm{eV}$

________________  $4.9\mathrm{eV}$

________________  $0$

After passing through the gas, electrons can have energies

Hydrogen alpha emission line emitted from a galaxy, corresponding to Balmer series transition from $n=3$ to $n=2$, is found to be Doppler shifted to $652.4\mathrm{nm}$. It can be concluded that the galaxy is

$R=1.097\times {10}^7 {\mathrm{m}}^{-1}$

What is an absorbance spectrum used for?

What is absorption spectrum and emission spectrum?

What is an absorption spectrum ?

Blue colour of the sky is due to

The frequency of radio waves from a certain radio station is $600 \mathrm{KHz}$. Its wavelength is

The ratio of wavelengths of the last line of Balmer series and the last line of Lyman series is

Which of the following properties of atom could be explained correctly by Thomson model of atom?

Humphrey series in the hydrogen spectrum is obtained as a result of the jump of electrons from $n_{\mathrm{l}}=6$ to $n_{\mathrm{h}}=7,8,9,10...$.

 The series of hydrogen that lies in the infrared region of electromagnetic spectrum is _____ series.

Briefly explain Humphrey series.

Name spectral series of hydrogen which lies in the infrared region of electromagnetic spectrum.

Which of the following is/are incorrect for Humphrey lines of hydrogen spectrum?

The shortest wavelength of the Lyman series of hydrogen spectrum is obtained during the transition of electrons between which of the following the shells:

Which of the following is a type of emission spectrum?

An electron in a hydrogen atom falls from an orbit with principal quantum number $n=2$ to $n=1.$ What is the wavelength $\left(\lambda \right)$ of the emitted radiation ? (where $R$ denotes the Rydberg constant).

If the series limit frequency of the Lyman series is $v_L$, then what is the series limit frequency of the Pfund series?

Who did experimental discovery of the Pfund series?

What is order of pfund series in atomic sptectra?