Seik et al. took a tungsten diselenide (WSe2) surface and then exposed it to the ultrafast light pulse. The electron emission was different at times. This happened because of the centrifugal barrier (repulsive force) that is related to the electron angular momentum.
With the advancement of technology and use of resources, there is a burning need for new resources. The pollution is increasing with every passing day, the climate is rising owing to the emission of greenhouse gases, and the resources are getting depleted.
Stars. Universe has confounded mankind since ancient times. Early man would look up at the night sky and try to decipher the various shapes and figures created by groups of stars clustered together.
In recent years, mankind has been using up non-renewable sources of energy at an ever-increasing speed. Our daily lives run on a gamut of gadgets, all of which require electricity to function. Is it any wonder then that an energy crisis is staring in the face of the human race, an energy crisis of a magnitude that is difficult to even contemplate?
Photons are the packets of energy which makes up the light, according to Einstein. Photons do not have a mass of their own but they do have energy and momentum.
We are facing a lot of water problems right now due to water scarcity. This innovation is definately the need of today. This experiment allows one to allow the water tank to get filled when we are not at home. This principle works on potential and kinetic energy produced due to overweight.
Atoms combine to form molecules. These molecules combine to make up a substance. The molecules in a substance are always in a state of random motion. The kinetic energy due to random motion of molecules of a substance is known as its heat energy. Thus, each body possesses heat energy in the form of its internal kinetic energy.