• The Photoelectric Effect Light Energy Electrons
    1,451 words
    Introduction The Quantum Theory was the second of two theories which drastically changed the way we look at our physical world today, the first being Einstein " theory of Relativity. Although both theories revolutionized the world of physics, the Quantum Theory required a period of over three decades to develop, while the Special Theory of Relativity was created in a single year. The development of the Quantum Theory began in 1887 when a German physicist, Heinrich Hertz, was testing Maxwell's Th...
  • Radio A Form Of Communication
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    Radio: A Form of CommunicationPhysicsIdoh GerstenMr. ZambiziPhysicsMarch 12, 1995 Radio is a form of communication in which intelligence is transmitted without wires from one point to another by means of electromagnetic waves. Early forms of communication over great distances were the telephone and the telegraph. They required wires between the sender and receiver. Radio, on the other hand, requires no such physical connection. It relies on the radiation of energy from transmitting antenna in t...
  • Radio Waves Frequency Wave Audio
    580 words
    Radio waves travel at 186, 000 miles per second through air. In contrast, sound waves travel at only 1/5 of a mile per second. If a modulation is made of the radio wave that exactly reproduces the amplitude and frequency characteristics of the original sound wave, then sound can be transmitted rapidly over long distances. This leads to a very interesting phenomena. During a live broadcast in New York, the music will reach listeners in California a fraction of a second before it can be heard by t...
  • Actor Diode Signal Frequency Circuit
    699 words
    Abstract This paper will discuss the design of an FM receiver. It will begin with a brief historical backdrop of FM broadcasting and its use in society. It will continue by providing the necessary mathematical background of the modulation process. Furthermore, it will enumerate some of the advantages of FM over other forms of modulation, namely AM. Finally, the paper will discuss the design of a basic FM receiver as well as introduce some circuits and circuit components which the reader may not ...
  • Physics Lab Speed Of Sound In Air
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    Physics Waves Lab SL Introduction: This lab will investigate the properties of mechanical waves such as a longitudinal wave, focusing on the question: Does a change in the frequency of a wave result in a significant and convincing change in the speed of the wave? Hypothesis: Changing the frequency of the wave will not result in a change in speed because the wavelength will change proportionally as in theory. Student Designed Investigation Procedure/ Planning Procedure: 1. Three students would ge...
  • Ultrasound Quick Project Sound Frequency Waves
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    Ultrasound - Quick Project Ultrasounds are sound waves with frequency beyond the human limits, therefore humans are unable to hear them. It even travels at exactly the same speed as sound in any medium. Humans can hear sound within the frequency range of about 20 to 20, 000 Hz, so any sound above 20 k Hz is ultrasound. Ultrasound or ultrasonography is a medical imaging technique that uses high frequency sound waves and their echoes. The technique is similar to the echolocation used by bats, whal...
  • H S Level Sound And Light Waves
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    Sounds are produced by the vibrations of material objects, and travel as a result of momentum transfer when air molecules collide. Our 'subjective impression' about the frequency of a sound is called pitch. High pitch has high vibration frequency, while low pitch has a low vibration frequency. A pure musical tone consists of a single pitch or frequency. However, most musical tones are "complex summations" of various pure frequencies - one characteristic frequency, called the fundamental, and a ...
  • Sound Tuning Fork
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    Resonance and Sound... Physics and Music Since sound is the medium of music, most of the physics of music is the physics of sound. It's important to remember that sound waves are compression waves. You can imitate a compression wave by stretching out a slinky (you do have a slinky, don't you? ) and flicking your finger against a coil at the end. Sound waves are not like the waves on the ocean or the waves you get by waving a stretched-out rope. Take a tuning fork (you do have a tuning fork, don...
  • The Photoelectric Effect Stopping Potential
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    The Photoelectric Effect The purpose of this experiment is to determine h / e (Plank's constant in units of electron volts), the work function F, and the threshold frequency for the photochathode surface provided. Three filters each having a distinct wavelength, were used to carry out this experiment. Utilizing these filters, 435. 8 nm, 546. 0 nm, and 577. 0 nm, data in voltage and current was collected, as potential was selected at random points for each wavelength. This data was then plotted ...
  • Communication Systems High Frequencies
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    COMMUNICATION SYSTEMS Barriers to Human Communication"X Language"X Distance Electronic Communications The transmission, reception, and processing of information using electronic circuits. History mid-19 th century! V James Clark Maxwell studied electromagnetic wave and predicted that it can be propagated through free space. 1837! V Samuel Morse invented the telegraph. 1876! V Alexander Graham Bell and Thomas A. Watson transmitted human conversation over a functional telephone system. 1888! V He...
  • Brain Wave Generation Brainwave Entrainment
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    Theory behind BrainWave Generator EEG and the brain's state EEG (Electroencephalography) technology is used to measure brain's electrical vibrations from the surface of the scalp. The resulting EEG pattern will contain frequency elements mainly below 30 Hz. The frequencies are categorized into four states as follows: State Frequency range Amplitude State of mind Delta 0. 5 Hz - 4 Hz high (up to 200 uV) Deep sleep Theta 4 Hz - 8 Hz low (5 uV - 20 uV) Drowsiness (also first stage of sleep) Alpha 8...
  • Radio Waves Frequency Wave Amplitude
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    Radio Waves In the modern society, radio is the most widely used medium of broadcasting and electronic communication: it plays a major role in many areas such as public safety, industrial manufacturing, processing, agriculture, transportation, entertainment, national defense, space travel, overseas communication, news reporting and weather forecasting. In radio broadcasts, they use the radio waves which can be both microwaves and longer radio waves. These are transmitted in two ways: amplitude m...
  • Radio Waves Frequency Wave Antenna
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    Before beginning our research on radio waves, to us, radio waves were just waves going through the atmosphere, carrying sound from one place to another. Those were our ignorant days! We did not realize the complicated terms and theories involved. In the following report you will see how we advanced in our knowledge of radio waves, and we hope it will do the same for you. Radio waves are a combination of two kinds of electric vibrations. Audio frequency waves, which represent voice and other soun...
  • Digital Block For A Function Generator
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    Digital Block Design Design introduction The Digital Block is the heart of this digitally controlled function generator. Symmetry and frequency variation is direct result of the design of this block. In this design the emphasis was on simplicity and some target specifications at the top of the frequency variation were compromised in order to achieve greater simplicity. This design achieves 28 frequencies in the range of 100 Hz to 100 k Hz. Whilst the 17 frequencies from the range 100 Hz to 10 k ...
  • Fourier Transform Frequency One Signal
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    In general transform language, the terms in the integrands exclusive of the s (t) and S (f) are called the kernels of the transforms. In the Fourier transform pair the kernels differ only slightly; the sign of the exponent in the Fourier transform is - and in the inverse transform it is +. To save space in writing the Fourier transform pair, the common shorthand expressions S (f) = [s (t) ] and s (t) = -1[S (f) ] will be used for the remainder of this web site for the Fourier transform and inver...
  • Tesla Coils Coil Primary Secondary
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    PES Physics Information Search A Tesla coil is a device that produces a high-frequency, high voltage current. When working at such high frequencies it can generate spectacular lightning-like discharges in to the air. The most popular use for the Tesla coils has been in the film industry, where they are used whenever lightning or electrical arcs are required. Scaled down versions of the tesla coil are also used in television sets. The Tesla coil was invented over 100 years ago. By Nikola Tesla. ...
  • Waveform Generator Frequency Peak Oscilloscope
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    Contents Introduction & Test Procedure Page 3 Test Procedure (contd. ) Page 4 Peak-to-Peak voltages & Frequency explained Page 4 Conclusion Page 4 Results Pages 5-10 Introduction The purpose of this laboratory exercise was to introduce the student to the techniques of using an Oscilloscope, a test meter, a waveform generator and a spectrum analyser. Three waveforms were examined; the first was a SINE WAVE; the second was a SQUARE WAVE; the third was a TRIANGULAR WAVE. The Oscilloscope was also u...
  • Bullfrogs Hearing Capacity Part Of The Experiment
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    The bullfrog belongs to the family Rani dae and is commonly known for their deep resonant croaks, large body size and large ears (tympani). These frogs have a body size of 20 cm/ 8 in and have legs that are longer than the body (25 cm/10 in). They reside in the United States, Canada, Mexico, Africa, and many others in quiet lakes and ponds. Bullfrogs are very aggressive when defending their territories and do not hesitate to attack invaders, even if a frog. Being that the bullfrogs have large ea...
  • Sound Waves Wave Intensity Ear
    399 words
    Sound Waves Waves are disturbances that travel through a space while changing its matter. A sound wave is what allows us to hear sounds. It is created by vibrations, which are made by the movement of matter. Sound waves must travel through a solid, a liquid, or a gas. The more tight the particles, the faster the wave will travel. This would mean that a sound wave travels fastest through solids and slowest through gases. The speed that it travels through a liquid would come somewhere in between ...
  • Marine Biology Ethics Low Frequency
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    When one thinks of ethics, most people only think of how it applies to humankind. People tend to overlook how human ethics transcend into the world of nature, specifically the world of Marine Biology. However, before we can discuss an Ethical Question concerning Marine Biology, we must first define ethics. According, to Webster Dictionary: ethics are the principles of right or good conduct, a system of good moral values. The ethical question I propose is that concerning the echolocation abilitie...