Dual Nature of ...

If the debroglie wave-length of $$He$$ at $$927^{o}C$$ is $$\lambda$$ then de-brolie wave-length of $$CH_{4}(g)$$ at $$27^{o}C$$ will be

If a light of wavelength $$\lambda$$ hits the moving electron, the uncertainty in measurement of its position will be

The ratio of de-Broglie wavelengths of molecules of hydrogen and helium Which are at temperature $$27^oC$$ and $$127^oC$$ respectively is 

If $$E_{1},E_{2},E_{3}$$ and $$E_{4}$$ the respectively kinetic energies of electron, decuteron proton and neutron having same de-Broglic wavelength, identity the correct in which those value would increase,

The debroglie wavelength of photoelectrons is $$1\mathring {A}$$. Its accelerating potential is :

Using the Heisenberg uncertainty principle arrange the following particles in the order of increasing lowest energy possible.
$$(I)$$ an electron in $$H_2$$ molecule
$$(II)$$ a $$H$$ atom in a $$H_2$$ molecule
$$(III)$$ a proton in the carbon nucleus
$$(IV)$$ a $$H_2$$ molecule within a nanotube

Cut off potentials for a metal in photoelectric effect for light of wavelength $$\lambda_{1},\lambda_{2}$$ and $$\lambda_{3}$$ is found to be $$V_{1}, V_{2}$$ and $$V_{3}$$ are in Arithmetic progression and $$\lambda_{1},\lambda_{2}$$ and $$\lambda_{3}$$ will be:

A particle of mass m kg and charge q coulomb is accelerated from rest through V volt: then the de-Broglie wavelength $$\lambda$$ associated with it is given by 

The wavelength $$\lambda_{e}$$ of an electron and $$\lambda_{p}$$ of a photon of same energy $$E$$ are related by

An electron is moving in $${ 2 }^{ nd }$$ excited orbit of H-atom Radius of orbit in terms of de-Broglie wavelength $$\lambda $$ of electron can be given as