Light reflection and refraction

  • Reflection of light
  • Spherical mirrors: Formation of image
  • Uses of spherical mirrors
  • Mirror formula and magnification
  • Refraction of light
  • Refraction by spherical lenses
  • Lens formula and magnification – Power of lens

Human eye and colorful world

  • The human eye
  • Power of accommodation
  • Why do we have two eyes
  • Defects of vision and its correction: myopia
  • Defects of vision and its correction: Hypermetropia
  • Defects of vision and its correction: Presbyopia
  • Defects of vision and its correction: Astigmatism
  • Refraction of light through prism
  • Dispersion of white light through glass prism
  • Atmospheric refraction
  • Scattering of light

Sources of energy

  • What is a good source of energy
  • Conventional sources of energy: fossil fuels
  • Conventional sources of energy: Hydro power plant
  • Alternate or non- conventional sources of energy: Biomass bio-gas
  • Non Conventional Sources of Energy -Ocean Thermal Energy
  • Non Conventional Sources of Energy -Solar Energy – Photo voltaic Cell
  • Non Conventional Sources of Energy – Tidal Energy
  • Non Conventional Sources of Energy – Geothermal Energy
  • Environmental consequences
  • How long will an energy source last us

Management of Natural Resources

  • Save the Environment from Environmental Pollution – Reuse
  • Save the Environment from Environmental Pollution – Reduce
  • Save the Environment from Environmental Pollution – Recycle
  • Why do we need to manage our natural resources
  • Forest and wildlife
  • Sustainable management
  • Water for all : dam
  • Water harvesting
  • Coal and petroleum
  • An overview of natural resource management