Frequency is inversely proportional to wavelength, since speed is fixed. Amplitude is independent of This happens when, for whatever reason, too much energy is put into the medium. Is this answer still relevant and up to date ? sponsored. Date: AMHS Chemistry Name: ELECTROMAGNETIC RADIATION using the relationship among wavelength, frequency, the speed of light and the energy. Wave frequency is related to wave energy. Since all that waves really are is traveling energy, the more energy in a wave, the higher its frequency. The lower the.
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We'll learn how to characterize a wave by its period, frequency, amplitude, speed, and wavelength. Once we get to know the right way to use these parameters, we'll be able to learn more about how the different waves work. These are the parts of the wave that are used to measure speed and size.
Let's start off by remembering what a wave looks like. We've seen the picture above before. It's a wave drawn over a set of X and Y axes.
We plotted the wave as a function of time and said that the portion of a wave between two crests or troughs is called a wave cycle. From this image, we can see that waves travel by crests and troughs in a periodic fashion. That is, a full wave cycle always takes the same amount of time. In this case, that amount of time is exactly two seconds. Two seconds is called the period of the wave.
Period and Frequency The period is the time it takes a wave to complete one cycle. We measure the period in seconds, and we symbolize it with the capital letter T. You can think of the period as the time it takes for one particle in the medium to move back and forth. If this were a water wave, all the particles in the water would be moving up and down as the wave travels through.
The time it takes for one water molecule to move up, move back down, and then return to its original position, is called the period. Knowing the period of a wave is fine, but we often need to talk about waves in terms of how often the wave cycles are coming. In other words, we want to know the frequency of a wave. A wave's frequency is the number of cycles that are completed in a certain amount of time.
The symbol for frequency is the lowercase f, and we measure it in cycles per second, which is the same as the unit hertz. A wave with a frequency of 20 Hz completes 20 wave cycles every second. Be careful that you don't confuse frequency with period. This is a common mistake. Frequency and period are actually opposites. While period is measured in seconds per cycle, frequency is measured in cycles per second.
Consider our wave with a period of 2 seconds. Since the wave completes one cycle every two seconds, then its frequency is one half or 0. So, you see - period and frequency are reciprocals of each other.
We can represent their relationship with a simple equation: This equation represents the relationship between frequency and period. Thomas Zesiger Thomas has taught electronics and communications engineering, math, and physics and has a master's degree in electrical engineering. In this lesson, we will learn the definition of a photon.
We will also explain Planck's constant and its relationship to the photon energy and wavelength. The calculation of photon energy is also demonstrated. Definition of a Photon A photon is the quantum of electromagnetic radiation. The term quantum is the smallest elemental unit of a quantity, or the smallest discrete amount of something. Thus, one quantum of electromagnetic energy is called a photon.
The plural of quantum is quanta. The concept of photons and quanta comes from quantum mechanics and quantum theory. Quantum mechanics is a mathematical model that describes the behavior of particles on an atomic and subatomic scale.
It demonstrates that matter and energy are quantized, or come in small discrete bundles, on the smallest scales imaginable. A photon propagates at the speed of light. A photon describes the particle properties of an electromagnetic wave instead of the overall wave itself.
Photon energy :
The energy of a photon is so small that we usually measure it in electronvolts eV. No matter what kind of wave you're looking at, the period and frequency will always be inversely proportional to each other.
- Photons and energy
- Definition of a Photon
- Relation between Frequency and Wavelength