Class 12 Physics Ch 11

Class 12 physics Chapter 11 Dual Nature of Radiation and Matter

CBSE Class 12 Physics Ch 11 Notes 
Dual Nature Of Radiation And Matter, the Class 12 Physics Chapter 11 Formulas provide a concise overview of all key concepts. The NCERT books provide basic equations, vital derivations, and crucial questions that students can grasp. This Chapter is critical for the CBSE examinations. It assists students in learning about fundamental topics such as the photoelectric effect, its laws, electron emission, and so on, as well as solving numerous numerical problems based on the formulas. 

Access all of the extensive and well-explained Class 12 Physics Chapter 11 Revision Notes by visiting the PW PhysicsWallah web platform and mobile app.
 Class 12th Physics Solutions Simple Solutions , notes for topper recap Quick Revision Notes and Solutions , Chapter summary most important Points Notes Dual Nature of Radiation and Matter CBSE Class XII Physics Notes with questions and Answers 

 The NCERT Results for Class 12 physics are matter experts according to the latest CBSE Syllabus 2023-24 and its marking schemes. Physics Class twelve NCERT PDF can come easy to understand  while preparing notes and during  different Exams. Class 12 physics Chapter 
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Class 12 Physics Chapter 11 Dual Nature of Radiation and Matter

 Photoelectric effect The phenomenon of photoelectric emission from the surface of the metal, when a light beam occurs at an appropriate frequency on it, TEM.  Emitted electrons are called photoelectrons, and the resulting current is called the photoelectric current.
 Hertz observation The phenomenon of electrical emission of images was discovered in 1887 .  In a thousand days, this is a message, it is not good, it is good.
 Lennard's note noted that when UV radiation was allowed to fall onto an emitter plate from a vacuum tube, it revived.  Once the UV rays have stopped, the current flows also stopped.  El
 2. Terminology related to photoelectric effects

 There are several terms related to the photoelectric effects that follow:
 (I) Free electrons in minerals, the electrons in the outer shells (valence electrons) are loosely bound to the atoms, and therefore they are free to move easily within the metallic surface but cannot leave the metallic surface.  These electrons are called free electrons.

 (2) Electron emission The phenomenon of electron emission from the surface of the metal is called an electron emission.
 (3) Photoelectric emission, which is the phenomenon of emission of electrons from the metal surface when light rays fall on it at a set frequency.
(iv) Work Function The minimum amount of energy required to just eject an electron from the outer most surface of metal is known as work function of the metal.

(v) Cut-off Potential For a particular frequency of incident radiation, the minimum negative (retarding) potential V0 given to plate for which the photoelectric current becomes zero, is called cut-off or stopping potential.

(vi) Cut-off Frequency The minimum frequency of light which can emit photoelectrons from a material is called threshold frequency or cut-off frequency of that material.
(vii) Cut-off Wavelength The maximum wavelength of light which can emit photoelectrons from a material is called threshold wavelength or cut-off wavelength of that material.
3. Effect of Intensity of Light on Photo current For a fixed frequency of incident radiation, the photoelectric current increases linearly with increase in intensity of incident light.

4. Effect of Potential on Photoelectric Current For a fixed frequency and intensity of incident light, the photoelectric current increases with increase in the potential applied to the collector. When all the photoelectrons reach the plate A, current becomes maximum it is known as saturation current.

5. Effect of Frequency of Incident Radiation  on Stopping Potential We take radiations of different frequencies but of same intensity. For each radiation, we study the variation of photoelectric current against the potential difference between the plates

Importance of PW PhysicsWallah Class 12 Physics Chapter-wise Notes

Class 12 physics Chapter 11 Dual Nature of Radiation and Matter  is an important study material for the Students who are presently studying in CBSE 12th standard. 

The PW PhysicsWallah offers free PDF downloads of Class 12 Physics Chapter 11 Dual Nature of Radiation and Matter Notes. These latest chapter-wise notes are ideal for quick preparation of CBSE board exams and school-based annual examinations. Additionally, CBSE Guide website provides comprehensive notes covering the latest syllabus of CBSE and NCERT, including all topics given in NCERT class 12 Physics textbook. Users can download CBSE guide quick revision notes from both platforms to score high in exams.

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