Physics Formulas for the chapter-Light

Physics Formulas

Chapter-Light of class 8 Science 


Light is simply a name for a range of electromagnetic radiation that can be detected by the human eye. Electromagnetic radiation has ai dual nature as both particles and waves.


Optics is the branch of physics which deals! with the study of light.

Wave interference

Wave interference is a phenomenon that occurs when two waves meet while traveling along the same medium.

Reflection of light

Reflection of light: When a beam of light Falls on any surface, a part of it is sent back into the same medium from which it is coming.

Human Eye

The eye is essentially a closed! Sphere into which light passes through ai Jens and strikes a light sensitive surface.

Laws of Reflection

  • Incident ray, normal ray and the reflected ray, all lie in the same plane.
  • The angle of reflection is always equal to the angle of incidence.

Defects of vision and their correction:

  • Myopia or Short Sightedness
  • Hyperopia or Hypermetropia or far Sightedness
  • Presbyopia: Defects arises with aging
  • Astigmatism: Difficulty in seeing the detail

Power of accommodation:

The eye accommodates for close vision by tightening the ciliary muscles, allowing the pliable! crystalline lens to become more rounded.

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Physics Formulas for the chapter-Light

Physics Formulas for the chapter-Light

Physics Formulas for the chapter-Light

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