Seema Saini Solutions for Chapter: Atomic Structure, Exercise 3: DPP 3.3

In a $\mathrm{H}$ atom, if $\text{'}\mathrm{x}\text{'}$ is the radius of the first Bohr orbit, the de-Broglie wavelength of an electron in the third orbit is:

A photon with energy equivalent to the binding energy of the fourth state of a ${\mathrm{He}}^{+}$ atom is used to eject an electron from the metal surface of work function $1.4\mathrm{eV}$. If electrons are further accelerated through the potential difference of $4 \mathrm{V}$, then the minimum value of the de Broglie wavelength associated with the electron will be:

In which of the following conditions, will the de-Broglie wavelength of the particle $\mathrm{A}$ be less than that of a particle $\mathrm{B}\left({\mathrm{m}}_{\mathrm{A}}>{\mathrm{m}}_{\mathrm{B}}\right)?$

Heisenberg uncertainty principle is not appreciable for:

Which of the following sets of physical phenomena is together showing the dual nature of radiation?

Select the correct statements if $\mathrm{h}\text{'}=\frac{\mathrm{h}}{2}$ and $\mathrm{\hslash }=\frac{\mathrm{h}}{2\mathrm{\pi }}$.

The de-Broglie equation treats an electron to be

The qualitative order of the de-Broglie wavelength for electron, proton and alpha particle is ${\mathrm{\lambda }}_{\mathrm{e}}>{\mathrm{\lambda }}_{\mathrm{p}}>{\mathrm{\lambda }}_{\mathrm{\alpha }}$, if