Two Features of the Photo-Electric Effect Essay

Classical physics failed to provide an explanation for the change in color of an object that accompanies temperature change and why objects glow when they get hot. This motivated Max Planck to experiment and attempt to find the reason for these phenomena. Later, Planck would discover that he was studying black-body radiation, which describes radiation that comes from a completely black surface. Since black does not reflect or emit light, it only can become colored by the addition of heat. Planck observed this, along with a change in the way physicists viewed electrons. Previously, it was believed that excited atoms began to oscillate and radiate energy continuously until stopping. Planck revisited and changed his standards to the belief

K. Paraphrase the three potential fates of the excited electron produced when a photon meets a chlorophyll molecule

- I think that the electrons that are emitted from the cathode are emitted with a range of velocities (perhaps like a Boltzmann distribution where average speed clusters in the middle of the range).

In 1915, the 5th November in Tonopah, Nevada; Hugh Bradner was born. Brother to Mead Bradner, and children to both Donald Bradner and Agnes Bradner (maiden name Mead). He and his brother were raised in Findlay, Ohio, and had done most schooling there. After high school, Hugh decided to study at Miami University in 1936. Hugh chose to study in the fields of Engineering, geophysics, and physics. Further on in life, he had received his doctorate from California Institute of Technology in 1941. He had written a thesis on “Electron-optical of the photoelectric effect” under guidance from William Houston.

of its low volatility and as a result was allowed four and one half hours to

Today we use visual images and words to communicate, advertise, and describe our surroundings. Words have been very useful to the world in every way possible. They can be used to read an article, describe a scene you saw, but those words would not give you the exact emotion as a photograph would. Though some people see the words others use more powerful, truly photography has more power. The best way to interpret life is through photography, not words.

Neuromuscular electrostimulation is a popular way to relieve pain and rejuvenate sore muscles. Neuromuscular electrostimulation is the elicitation of muscle contraction using electrical impulses. In sports medicine, neuromuscular electrostimulation has been used for muscle strengthening, maintenance of muscle mass and strength during periods of prolonged immobilization, selective muscle retraining, and the control of edema. But what will the effects be of neuromuscular electrostimulation and plyometric training on the vertical jump height of teenage athletes? Will the vertical jump height increase, decrease, or stay the same after an eight-week period of using neuromuscular electrostimulation to rejuvenate and strengthen muscles after plyometric training sessions.

In 1913 Niels Bohr proposed a hydrogen-atom model that linked the atom’s electron to the photon emission. According to his model, electrons circle the nucleus only in allowed circuits. When the electron is in one of these orbits, the atom has a definite, fixed energy. The electron has the lowest energy state when it is in the orbit closest to the nucleus. The energy of the electron is higher as the electron is in orbits that are successively farther from the nucleus. He also discovered that an electron can be one orbit or another but not in between.

Thomas Edison improved upon the incandescent light bulb was a success and is widely still used to this day. Remarkably, the reason we have music recordings today is due to Edison’s phonograph in which we dedicated upon so much time. The next time you are enjoying your music you should thank Mr. Thomas Edison. Motion Picture Films is brought to you by Thomas Edison due to his contribution to the Kinetograph. Whenever you plan to go out for movie night or are watching Netflix think about how you are watching it. Very similar to the alkaline storage battery in your clocks, toys, kitchen utensils, and every alkaline battery you find now, Edison contributed for you to utilize. For these reasons Thomas Edison is the most influential American in

The world's oldest existing photograph was taken on a summer day in 1827 by a retired French army officer. He called it a Heliograph (sun drawing). It took eight hours to expose.

However, much of the phenomenon observed during the photoelectric effect was in contradiction to the Wave Theory of Light. For instance, the energy contained in electromagnetic waves, and the amount of energy that would strike a sodium electron can be calculated. Such a calculation shows that an electron could indeed gain enough energy to be liberated from the sodium, but only after the sodium had been

The precise reliance of the reflected electron force was measured, and was resolved to have the same diffraction design as those anticipated by Bragg for x-beams. Prior to the acknowledgement of the de Broglie speculation, diffraction was a property that was thought to be just shown by waves. Subsequently, the vicinity of any diffraction impacts by matter exhibited the wave-like nature of matter. At the point when the de Broglie wavelength was embedded into the Bragg condition, the watched diffraction example was anticipated, in this way tentatively affirming the de Broglie speculation for electrons.

‘The formulation of Maxwell's equations is the most important event in physics since Newton's time, not only because of their wealth of content, but also because they form a pattern for a new type of law …

Albert Einstein was a big contributor in proving the photoelectric effect. He theorized that light moves in small quantized packets, rather than in waves. That led to the photoelectric effect to be better explained. He published his findings in a paper in 1905, and he received the Nobel Prize in 1921. His discoveries led to the quantum revolution. In 1905 a simple interpretation was made by Albert Einstein about Lenard’s result. He thought of the incoming radiation as quanta of frequency (hf), where f is the frequency. In the photoemission, one such quantum is absorbed by one electron. If the electron is some distance into the material of the cathode, some energy will be lost as it moves towards the surface. There will always be some electrostatic

Ideas in the subject of Physics are never absolute; it is a forever-changing topic. We think we have discovered everything there is to know about it, and then we find out something new that changes everything. That is one of the reasons physics is so interesting to learn about – there will always be something new. There are many very important discoveries in Physics. This paper will describe some of the discoveries. These discoveries are prevalent throughout history and in our daily lives.