Scientists such as heinrich hertz, philipp lenard, max planck, and albert einstein made scientific contributions that ultimately demonstrated that light is electromagnetic radiation, and that it has a “dual nature.” some electromagnetic phenomena are best explained with a particle model, and some with a wave model. in a sense, “wave” and “particle” are just easy mental models for light. we employ them because we are used to seeing waves and particles—such as those in water waves and baseballs—in our daily lives. electromagnetic radiation is a basic concept in physics, but it doesn’t fit completely into one of these neat little boxes. research and discuss at least one modern technology that employs electromagnetic radiation and that can be explained by the wave model, the particle model, or a combination of the two. some possible technologies include solar panels, burglar alarms, cameras, and cell phones.

Solar panels employ electromagnetic radiation that can be explained by particle model. An electromagnetic radiation can be considered to be formed by of particles- photons which carry quanta of energy. A solar panel consists of photo-voltaic cells on which electromagnetic radiation from Sun (photons) radiate and electrons get knock off generating electricity.

this is an example of "committed" time.

committed time, as contracted time, takes need over essential and available time since it is seen as profitable work. it alludes to the time allotted to keep up a home and family. at the point when a man is commuting using committed time this individual may feel that the drive is an obligation to family, for example, strolling youngsters to class or driving a mate to work. contracted and committed time clients may feel that their commute could really compare to the commute of important or leisure time clients on the grounds that their commute is profitable work. in this manner, they might be more disposed to pick a mechanized method of movement.