Impact parameter (b) is the perpendicular distance of the velocity vector of the alpha-particle from the central line of nucleus, when the particle is far away from the nucleus. Class 12 Physics Chapter 12 Atoms Session 2024-2025.
Discussion Forum Latest Questions
It is the distance from nucleus at which an energetic a-particles approaching directly towards the nucleus, retraces its path through 180°. At distance of closest approach speed of a-particle is zero. Class 12 Physics Chapter 12 Atoms Session 2024-2025.
From large angle scattering of a-particles we conclude that almost whole mass and whole positive charge of the atom is concentrated in a tiny space, called nucleus, at the centre of atom. Class 12 Physics Chapter 12 Atoms Session 2024-2025.
No, most electrons get scattered into the metal. Only a few come out of the surface of the metal. Class 12 Physics Chapter 11 Dual Nature of Radiation and Matter Session 2024-2025.
(i) No, (ii) Yes, increases on increasing the frequency of incident light. Class 12 Physics Chapter 11 Dual Nature of Radiation and Matter Session 2024-2025.