A monoenergetic beam a alpha particle , each of them having kinetic E is incident on a sample of singly ionised Helium gas in ground state . The Helium gas in ground state. The Helium sample may start emitting radiation Since the Kinetic energy of incident alpha particle in sufficiently high . A part of this radiation (if any) is allowed to pass through atomic Hydrogen sample in ground state. A detector placed near the hydrogen records both radiation and electrons. Assume all `He^(+)` ions to be initially at rest.
If no electrons are interpected by the detector the energy of photons detected by it can be -

A monoenergetic beam a alpha particle , each of them having kinetic E is incident on a sample of singly ionised Helium gas in ground state . The Helium gas in ground state. The Helium sample may start emitting radiation Since the Kinetic energy of incident alpha particle in sufficiently high . A part of this radiation (if any) is allowed to pass through atomic Hydrogen sample in ground state. A detector placed near the hydrogen records both radiation and electrons. Assume all He^(+) ions to be initially at rest. If maximum Kinetic energy of electrons interpected by the detector is 27.2eV , the minimum kinetic of alpha paticle energy of alpha particle ,must be-

A monoenergetic beam a alpha particle , each of them having kinetic E is incident on a sample of singly ionised Helium gas in ground state . The Helium gas in ground state. The Helium sample may start emitting radiation Since the Kinetic energy of incident alpha particle in sufficiently high . A part of this radiation (if any) is allowed to pass through atomic Hydrogen sample in ground state. A detector placed near the hydrogen records both radiation and electrons. Assume all He^(+) ions to be initially at rest. If maximum Kinetic energy of electron intercepted by the detector is 27.2eV , the K.E of particle must be lower than -

For a single ionised helium atom, the longest wavelength in ground state will absorb

The longest wavelength that the singly ionized helium atom in its ground state will obsorb is

The longest wavelength that the singly ionized helium atom in its ground state will obsorb is

An electron with kinetic energy 5eV is incident on a hydrogen atom in its ground state.The collision

An electron with kinetic energy 5eV is incident on a hydrogen atom in its ground state.The collision

An electron with kinetic energy 5eV is incident on a hydrogen atom in its ground state.The collision

An electron with kinetic energy 10 eV is incident on a hydrogen atom in its ground state. The collision

An electron with kinetic energy 5eV is incident on a hydrogen atom in its ground state.The collision