Atomic Physics

The shortest wavelength of the spectral lines in the Lyman series of hydrogen spectrum is $915 Ã\ldots$. The longest wavelength of spectral lines in the Balmer series will be _____ $Ã\ldots$?

The energy levels of an atom is shown is figure. Which one of these transitions will result in the emission of a photon of wavelength $124.1\mathrm{nm}$? Given ($h=6.62\times\,10^{-34}Js$)

For hydrogen atom, $\lambda\,_{1}$and $\lambda\,_{2}$ are the wavelengths corresponding to the transitions $1$ and $2$ respectively as shown in figure. The ratio of $\lambda\,_{1}$ and $\lambda\,_{2}$ is $\frac{x}{32}$.…

As per given figure $A,B$and $C$ are the first, second and third excited energy levels of hydrogen atom respectively. If the ratio of the two wavelengths$\left(i.e.\frac{\lambda\,_{1}}{\lambda\,_{2}}\right)$is…

Some energy levels of a molecule are shown in the figure. The ratio of the wavelengths $r=\frac{\lambda\,_{1}}{\lambda\,_{2}}$, is given by:

When a hydrogen atom going from $n=2$to $n=1$emits a photon, its recoil speed is $\frac{x}{5}ms^{-1}$.Where $x=$_______. (Use: mass of hydrogen atom $=1.6\times\,10^{-27}\mathrm{kg}$, charge of…

$X$ different wavelength may be observed in the spectrum from a hydrogen sample if the atoms are excited to states with principal quantum number $n=6$? The value of $X$ is

The first member of the Balmer series of hydrogen atom has a wavelength of $6561\overset{\circ\,}{A}$. The wavelength of the second member of the Balmer series (in nm) is_____________

$\sqrt{d_{1}}$ and $\sqrt{d_{2}}$ are the impact parameters corresponding to scattering angles $60^{\circ}$ and $90^{\circ}$ respectively, when an $\alpha\,$ particle is approaching a gold nucleus. For $d_{1}=xd_{2}$,…

The mass defect in a particular reaction is $0.4g$. The amount of energy liberated is$n\times\,10^{7}\mathrm{kW}h$,where $n=$ _____. (speed of light$=3\times\,10^{8}ms^{-1}$)

In Bohr's atomic model, the electron is assumed to revolve in a circular orbit of radius $0.5 \overset{\circ}{A}.$ If the speed of electron is $2.2\times {10}^{6} m {s}^{-1}.$ Then the current associated with the…

Which of the following figure represents the variation of $\ln\,\left(\frac{R}{R_{0}}\right)$ with $\ln\,A$ (if $R=$radius of a nucleus and $A=$ its mass number)