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.

where is the circuit diagram ?

the box does not move because you need to use a force greater than 300 n. you are only using 50 n. it needs to at least be 301 n for the box to move because then it is an unbalanced force and it will move the way that the greater force is pushing it. if you use only 300 n it will be a balanced force and will not move because the force you are exerting on the   box is the same as its force.

hope this !

im sorry if i went too in depth, i am going to include a link to a video on khan academy that will explain this.   hope that you like the video and that it explains more in detail to you.

that is the link.