Important questions of ray optics
Physics classes by Nayan jha providing the syllabus for term -2 CBSE (physics)Examination ; guided by CBSE( Distribution of marks may change in some circumstances)
CBSE Class 12 Physics Syllabus Term – 2 (2021-22)
Time: 2hrs
Max Marks: 35
| SI. No. | Chapter Name | marks | |
| Unit–V | Electromagnetic Waves | 2-3 | |
| Chapter–8: Electromagnetic Waves | |||
| Unit–VI | Optics | 14-15 | |
| Chapter–9: Ray Optics and Optical Instruments | |||
| Chapter–10: Wave Optics | |||
| Unit–VII | Dual Nature of Radiation and Matter | 4-5 | |
| Chapter–11: Dual Nature of Radiation and Matter | |||
| Unit–VIII | Atoms and Nuclei | 6-7 | |
| Chapter–12: Atoms | |||
| Chapter–13: Nuclei | |||
| Unit–IX | Electronic Devices | 7 | |
| Chapter–14: Semiconductor -Electronics: Materials, Devices and Simple Circuits | |||
| Total | 35 |
Unit (i – iv is provided for term-1 examination)
Unit V: Electromagnetic waves
Chapter–8: Electromagnetic Waves
Electromagnetic waves, their characteristics, their Transverse nature (qualitative ideas only). Electromagnetic spectrum (radio waves, microwaves, infrared, visible, ultraviolet, X-rays, gamma rays) including elementary facts about their uses.
Unit VI: Optics
Chapter–9: Ray Optics and Optical Instruments
Ray Optics: Refraction of light, total internal reflection and its applications, optical fibers, refraction at spherical surfaces, lenses, thin lens formula, lensmaker’s formula, magnification, power of a lens, combination of thin lenses in contact, refraction of light through a prism.
Optical instruments: Microscopes and astronomical telescopes (reflecting and refracting) and their magnifying powers.
Chapter–10: Wave Optics
Wave optics: Wavefront and Huygens principle, reflection and refraction of plane waves at a plane surface using wave fronts. Proof of laws of reflection and refraction using Huygens principle. Interference, Young’s double slit experiment and expression for fringe width, coherent sources and sustained interference of light, diffraction due to a single slit, width of central maximum.
Unit VII: Dual Nature of Radiation and Matter
Chapter–11: Dual Nature of Radiation and Matter
Dual nature of radiation, Photoelectric effect, Hertz and Lenard’s observations; Einstein’s photoelectric equation-particle nature of light. Experimental study of photoelectric effect Matter waves-wave nature of particles, de-Broglie relation
Unit VIII: Atoms and Nuclei
Chapter–12: Atoms
Alpha-particle scattering experiment; Rutherford’s model of atom; Bohr model, energy levels, hydrogen spectrum.
Chapter–13: Nuclei
Composition and size of nucleus Nuclear force Mass-energy relation, mass defect, nuclear fission, nuclear fusion.
Unit IX: Electronic Devices
Chapter–14: Semiconductor Electronics: Materials, Devices and Simple Circuits
Energy bands in conductors, semiconductors and insulators (qualitative ideas only) Semiconductor diode – I-V characteristics in forward and reverse bias, diode as a rectifier; Special purpose p-n junction diodes: LED, photodiode, solar cell.