Embibe Experts Solutions for Chapter: Atomic Physics, Exercise 1: Exercise - 1

Visible light passing through a circular hole forms a diffraction disc of radius $0.1 \mathrm{mm}$ on a screen. If X-ray is passed through the same set-up, the radius of the diffraction disc will be

The orbital speed of the electron in the ground state of hydrogen is $v.$What will be its orbital speed when it is excited to the energy state $– 3.4 \mathrm{eV}$ ?

The total energy of the electron in the first excited state of hydrogen is $– 3.4 \mathrm{eV}.$ What is the kinetic energy of the electron in this state ?

The total energy of the electron in the first excited state of hydrogen is $–3.4 \mathrm{eV}$. the potential energy of the electron is :

Imagine an atom made of a proton and a hypothetical particle of double the mass as that of an electron but the same charge. Apply Bohr theory to consider transitions of the hypothetical particle to the ground state. Then, the longest wavelength (in terms of Rydberg constant for hydrogen atom) is

It is observed that some of the spectral lines in hydrogen spectrum have wavelengths almost equal to those of the spectral lines in${\mathrm{He}}^{+} \mathrm{ion},$Out of the following the transitions in ${\mathrm{He}}^{+}$ that will make this possible is

The characteristic X-ray spectrum is emitted due to transition of

When ultraviolet light is incident on a photocell, its stopping potential is ${\mathrm{V}}_0$ and the maximum kinetic energy of the photoelectrons is ${\mathrm{K}}_{\max }$. When X-rays are incident on the same cell, then :