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.
Category: Class 12 Physics
NCERT Solutions for Class 12 Physics updated for CBSE academic session 2021-2022.
Discussion Forum Latest Questions
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.
To cause photoelectric emission from a metal surface, a minimum amount of energy is required to eject electron. Therefore, frequency of incident radiation must be equal to or greater than a minimum frequency. Class 12 Physics Chapter 11 Dual Nature ...
(i) No electron will be emitted when illuminated by red light. (ii) Electron emission takes place with blue light. Class 12 Physics Chapter 11 Dual Nature of Radiation and Matter Session 2024-2025.