NCERT-science-10th-chapter10-Lesson2

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  • Light and its nature have caused a lot of ink to flow during these last decades. Its dual behavior is partly explained by (1)Double-slit experiment of Thomas Young - who represents the photon’s motion as a wave - and also by (2)the Photoelectric effect in which the photon is considered as a particle. A Revolution: SALEH THEORY solves this ambiguity and this difficulty presenting a three-dimensional trajectory for the photon's motion and a new formula to calculate its energy. More information on https://youtu.be/mLtpARXuMbM or https://www.slideshare.net/SalehTheory/saleh-theory?qid=fa70d6c2-03f4-43e1-8177-c710dd7b3b5f&v=&b=&from_search=1
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NCERT-science-10th-chapter10-Lesson2

  1. 1. Gyanome: Sample LessonNCERT : Xth : ScienceChapter 10: Light –Reflection and Refraction
  2. 2. GYANOME Search Subjects, Chapters, Lessons and Activities AccountNCERT >English > 10th>Science > Chapter 10: Light- Reflection and Refraction ChangeSelect Lesson10.1 Reflection andRefraction of Light-IntroductionGyanomeUser10.2 Reflection ofLightGyanomeUser10.3 Spherical MirrorsGyanomeUser10.4 Refraction ofLightGyanomeUser10.4 Spherical LensesGyanomeUser
  3. 3. GYANOME Search Subjects, Chapters, Lessons and Activities AccountNCERT >English > 10th>Science > Chapter 10: Light- Reflection and Refraction ChangeLesson 10. 1Reflection of LightChangeLaws of reflection of lightFirst law of reflection oflightSecond law of reflection oflightReflection from sphericalsurfacesReflection from sphericalsurfacesReflections from ShiningspoonReflection on curvedsurfacesReflection of LightLaws of reflection of LightA highly polished surface, such as a mirror, reflects most of the light fallingon it. You are already familiar with the laws of reflection of light.Let us recall these laws – The angle of incidence is equal to the angle of reflection, and The incident ray, the normal to the mirror at the point of incidence andthe reflected ray, all lie in the same plane.NextPrevious
  4. 4. GYANOME Search Subjects, Chapters, Lessons and Activities AccountNCERT >English > 10th>Science > Chapter 10: Light- Reflection and Refraction ChangeLesson 10. 1Reflection of LightChangeLaws of reflection of lightFirst law of reflection oflightSecond law of reflection oflightReflection from sphericalsurfacesReflection from sphericalsurfacesReflections from ShiningspoonReflection on curvedsurfacesReflection of LightLaws of Reflection of LightNormal: The line perpendicular to the mirror is called the Normal. In thediagram below, the line ON is the normal.NextPreviousMirrorirRay of light from ObjectRay of light to the eyeNormal tothe mirrorNOA B
  5. 5. GYANOME Search Subjects, Chapters, Lessons and Activities AccountNCERT >English > 10th>Science > Chapter 10: Light- Reflection and Refraction ChangeLesson 10. 1Reflection of LightChangeLaws of reflection of lightFirst law of reflection oflightSecond law of reflection oflightReflection from sphericalsurfacesReflection from sphericalsurfacesReflections from ShiningspoonReflection on curvedsurfacesReflection of LightLaws of Reflection of LightAngle of Incidence: The angle between the incident ray and the Normal iscalled the angle of incidence. In the figure, angle AON denoted by letter i isthe angle of incidenceNextPreviousMirrorirRay of light from ObjectRay of light to the eyeNormal tothe mirrorNOA B
  6. 6. GYANOME Search Subjects, Chapters, Lessons and Activities AccountNCERT >English > 10th>Science > Chapter 10: Light- Reflection and Refraction ChangeLesson 10. 1Reflection of LightChangeLaws of reflection of lightFirst law of reflection oflightSecond law of reflection oflightReflection from sphericalsurfacesReflection from sphericalsurfacesReflections from ShiningspoonReflection on curvedsurfacesReflection of LightLaws of Reflection of LightAngle of Reflection: The angle between the reflected ray and the Normal iscalled the angle of reflection. In the figure, angle BON denoted by letterristhe angle of reflectionNextPreviousMirrorirRay of light from ObjectRay of light to the eyeNormal tothe mirrorNOA B
  7. 7. GYANOME Search Subjects, Chapters, Lessons and Activities AccountNCERT >English > 10th>Science > Chapter 10: Light- Reflection and Refraction ChangeLesson 10. 1Reflection of LightChangeLaws of reflection of lightFirst law of reflection oflightSecond law of reflection oflightReflection from sphericalsurfacesReflection from sphericalsurfacesReflections from ShiningspoonReflection on curvedsurfacesReflection of LightFirst Law of Reflection of LightThe angle of incidence is equal to the angle of reflectionNextPreviousMirrorirRay of lightfrom Object Ray of light tothe eyei = rNormal tothe mirror
  8. 8. GYANOME Search Subjects, Chapters, Lessons and Activities AccountNCERT >English > 10th>Science > Chapter 10: Light- Reflection and Refraction ChangeLesson 10. 1Reflection of LightChangeLaws of reflection of lightFirst law of reflection oflightSecond law of reflection oflightReflection from sphericalsurfacesReflection from sphericalsurfacesReflections from ShiningspoonReflection on curvedsurfacesReflection of LightSecond Law of Reflection of LightThe incident ray, the normal to the mirror at the point of incidence andthe reflected ray, all lie in the same plane.NextPrevious
  9. 9. GYANOME Search Subjects, Chapters, Lessons and Activities AccountNCERT >English > 10th>Science > Chapter 10: Light- Reflection and Refraction ChangeLesson 10. 1Reflection of LightChangeLaws of reflection of lightFirst law of reflection oflightSecond law of reflection oflightReflection from sphericalsurfacesReflection from sphericalsurfacesReflections from ShiningspoonReflection on curvedsurfacesReflection of LightReflection from Spherical SurfacesThese laws of reflection are applicable to all types of reflecting surfacesincluding spherical surfaces. You are familiar with the formation of imageby a plane mirror.What are the properties of the image? Image formed by a plane mirror is always virtual and erect. The size of the image is equal to that of the object. The image formed is as far behind the mirror as the object is in front ofit. Further, the image is laterally inverted.How would the images be when the reflecting surfaces are curved? Let usexplore.NextPrevious
  10. 10. GYANOME Search Subjects, Chapters, Lessons and Activities AccountNCERT >English > 10th>Science > Chapter 10: Light- Reflection and Refraction ChangeLesson 10. 1Reflection of LightChangeLaws of reflection of lightFirst law of reflection oflightSecond law of reflection oflightReflection from sphericalsurfacesReflection from sphericalsurfacesReflections from ShiningspoonReflection on curvedsurfacesReflection of LightReflection from Spherical SurfacesTake a large shining spoon. Try to view your face in its curved surface. Do you get the image? Is it smaller or larger? Move the spoon slowly away from your face. Observe the image.How does it change? Reverse the spoon and repeat the Activity. How does the imagelook like now? Compare the characteristics of the image on the two surfaces.NextPrevious
  11. 11. GYANOME Search Subjects, Chapters, Lessons and Activities AccountNCERT >English > 10th>Science > Chapter 10: Light- Reflection and Refraction ChangeLesson 10. 1Reflection of LightChangeLaws of reflection of lightFirst law of reflection oflightSecond law of reflection oflightReflection from sphericalsurfacesReflection from sphericalsurfacesReflections from ShiningspoonReflection on curvedsurfacesReflection of LightReflection from Shining SpoonTake a large shining spoon. Try to view your face in its curved surface.• Do you get the image? Is it smaller or larger?• Move the spoon slowly away from your face. Observe the image. Howdoes it change?• Reverse the spoon and repeat the Activity. How does the image looklike now?• Compare the characteristics of the image on the two surfaces.NextPrevious
  12. 12. GYANOME Search Subjects, Chapters, Lessons and Activities AccountNCERT >English > 10th>Science > Chapter 10: Light- Reflection and Refraction ChangeLesson 10. 1Reflection of LightChangeLaws of reflection of lightFirst law of reflection oflightSecond law of reflection oflightReflection from sphericalsurfacesReflection from sphericalsurfacesReflections from ShiningspoonReflection on curvedsurfacesReflection of LightReflection from Spherical SurfacesThe curved surface of a shining spoon could be considered as a curvedmirror. The most commonly used type of curved mirror is the sphericalmirror. The reflecting surface of such mirrors can be considered to form apart of the surface of a sphere. Such mirrors, whose reflecting surfaces arespherical, are called spherical mirrors.We shall now study about spherical mirrors in some detail.NextPrevious
  13. 13. GYANOME Search Subjects, Chapters, Lessons and Activities AccountNCERT >English > 10th>Science > Chapter 10: Light- Reflection and Refraction ChangeLesson 10. 1Reflection of LightChangeLaws of reflection of lightFirst law of reflection oflightSecond law of reflection oflightReflection from sphericalsurfacesReflection from sphericalsurfacesReflections from ShiningspoonReflection on curvedsurfacesReflection of LightReflection from Spherical SurfacesIn the next lesson shallstudy about spherical mirrors in some detail.NextPrevious

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