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the new theory reconciles the particle properties of light with the wave nature. In this Chapter, we shall study the phenomena of reflection and refraction of light using the straight-line propagation of light.
- 11.4 EXPERIMENTAL STUDY OF PHOTOELECTRIC EFFECT
- 11.4.2 Effect of potential on photoelectric current
- SUMMARY
- POINTS TO PONDER
Figure 11.1 depicts a schematic view of the arrangement used for the experimental study of the photoelectric effect. It consists of an evacuated glass/quartz tube having a thin photosensitive plate C and another metal plate A. Monochromatic light from the source S of sufficiently short wavelength passes through the window W and falls on the photos...
We first keep the plate A at some positive potential with respect to the plate C and illuminate the plate C with light of fixed frequency n and fixed intensity I 1. We next vary the positive potential of plate A gradually and measure the resulting photocurrent each time. It is found that the photoelectric current increases with increase in positiv...
The minimum energy needed by an electron to come out from a metal surface is called the work function of the metal. Energy (greater than the work function fo) required for electron emission from the metal surface can be supplied by suitably heating or applying strong electric field or irradiating it by light of suitable frequency. Photoelectric ef...
Free electrons in a metal are free in the sense that they move inside the metal in a constant potential (This is only an approximation). They are not free to move out of the metal. They need additional energy to get out of the metal. Free electrons in a metal do not all have the same energy. Like molecules in a gas jar, the electrons have a certain...
Nov 6, 2023 · Free PDF Download of NCERT Physics Book Class 11 in English. Students can also download the NCERT Textbooks Solutions in PDF for Class 11 Physics Book.
Light is reradiated and propagated forward through medium. Medium is transparent. In a solid or liquid, propagation is in straight line.
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Jul 12, 2019 · NCERT Books for Class 11 Physics covers all the important topics and concepts that are prescribed in NCERT Curriculum and CBSE Class 11 Physics Syllabus. All the topics and concepts are explained in easily understandable language.
The study of light and geometric optics deepens students’ knowledge of the properties of light. The use of ray diagrams continues as the primary means of representing the propagation of light. Algebraic equations for refraction and lenses introduce students to the power of mathematical models.
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Download the FREE PDF of CBSE Class 11 Physics Notes. Find simplified explanations, key concepts, and important formulas to improve your understanding.
