electromagnetic
03 Oct 2014
Waves- Different forms
Waves are travelling disturbances that transfer energy from one place to another. They do not transfer matter. The amplitude of a wave determines its energy. Higher the amplitude, higher is its energy. Sound, light etc are all different kind of waves. They can be classified in different ways based on their characteristics. One such classification is
20 Sep 2014
Remote controls- Different types
TVs, DVDs players, stereos, ACs – all these components are operated using remote controls from a distance. These remote control devices utilize low frequency light that are invisible to our eyes to send out signals. The device has got an internal circuit with a processor and a light emitting device. Based on the function that