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focus-portal.net

Focus A Portal Net Form 5 Physics Chapter

March 23, 2018

Description: The article is about the motion of waves, focusing on the content of those areas including amplitude period and frequency of the wave, the relationship between the speed wavelength and the frequency, two factors which contribute to the damping and some phenomenon of the wave interference.

Our first lesson will be about the motion of waves, an oscillating or vibrating system along a line about a fixed central point produces a wave example of waves water, wave lightwave.

A wave front is a line which joins all the phase points, there are two types of the waves, transverse wave and longitudinal wave, a transverse wave is a wave which the vibration of the particles are perpendicular to the direction of the propagation of the wave.

While a long eternal wave is a wave which the vibration of the particle is parallel to the direction of the propagation of the wave, example of a longitudinal wave is sun wave dissident.

The next concept will be amplitude period and frequency of the wave amplitude of a vibrating system is the maximum displacement from its equilibrium position while period of a vibrating system is a time taken to complete an oscillation frequency is the number of a complete oscillation made in one second.

The next consent will be the relationship between the speed wavelength and the frequency, the relationship between the speed wavelength and the frequency can be stated by the formula of V equals to F lambda SI unit.

The speed will be meter per second wavelength meter and frequency will be hurts or per second year student, the next lesson will be the damping and resonant to understand the concept of a damping.

Let’s look at the diagram shown in the sign, the amplitude of the oscillation of the simple pendulum will gradually decrease NB zero, when the oscillation stop the decrease in the amplitude of the oscillating, system is one called damping, an oscillating system experienced damping when its energy is drained out as a heat energy.

Two factors which contribute to the damping will be the internal damping and external damping internal damping of the system is the energy loss due to the extension and compression of the molecules in the system.

While exon damping is the loss of energy to overcome the frictional force yesterday on the boat graph in a slide shows how amplitude and the displacement decreases against the time vamping in oscillating system cause decreases in amplitude and energy.

But the frequency does not change resonance occurs when the system is made to oscillate at the frequency equivalent to its natural frequency by an external force.

The first phenomenon of the wave will be the reflection of the wave, reflection of the wave occurs when a wave strikes an obstacle, the waves undergo in a change in a direction of propagation.

When it is reflected, when reflection occurs speed wavelength, frequency does not change direction of the reflected wave will change an amplitude of the reflected wave decreases second phenomenon refraction of the wave.

What a wave undergo refraction when there is a change in the speed of the wave, as you can see, on the slide, whatever you undergo change in the velocity and the wavelength.

When passing through from the deep water to the shallow water, when water wave transmitter from a deep water into the shallow water, the wave is reflected to its normal, the wave are refracted away from the normal, when the water wave transmitter from the shallow water into the deep water.

The third phenomenon of the wave diffraction of the wave is a phenomenon in which they spread out, as it passed through any gap or obstacle effect of the diffraction is obvious only if the size of the game or obstacle are small enough, the wavelength is large enough.

The characteristic of the diffracted wave frequency wavelength and the speed does not change while the amplitude or the energy decreases.

The last phenomenon of the wave interference is the superposition of the two waves originating from the two coherent sources which are coherent producing a wave of the same frequency constructive interference occur when the crash or the trance of the both waves over land to produce a wave with a class.

The trust of the maximum amplitude destructive interference occurs, then the class of the one of the wave overlap with the draw of the other wave with the result that the resultant amplitude is 0 diagram shows the interference of the wave where the constructive interference and the destructive interference occurs.

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