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Aafia
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This term is new for me so explain it simply ... and give a simple definition about cutt off frequency
What is the Cut-off Frequency and How Does it Affect Signal Processing?
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In summary: It's much clearer now. In summary, the cutoff frequency is the frequency at which the maximum kinetic energy of the electrons in the photoelectric effect becomes zero. It can also be used to describe certain electrical circuits.
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DrGreg
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Please give an example of where you have seen this.Aafia said:
If you've seen it on the internet, give a link, otherwise give the sentence i
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Vanadium 50
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Aafia, looking at this and your other questions, I think you will get more out of PF if you read this: https://www.physicsforums.com/threads/very-little-excuse-to-ask-a-question-cold.765735/
Also, you will have better luck if you spell it "cut".
Also, you will have better luck if you spell it "cut".
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Aafia
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Sory... i have search it in google but it use complicated wordsVanadium 50 said:
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Aafia
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I have seen it in physics book chapter about light and the topic is photoelectric effect ..DrGreg said:
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jtbell
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Thanks. 
So you probably know that when you shine light on a metal surface, it ejects electrons. As the frequency of the light increases, the maximum kinetic energy of the electrons increases. As the frequency of the light decreases, the maximum KE of the electrons decreases, and there is a certain frequency at which the maximum KE of the electrons becomes zero. Below that frequency, the photoelectric effect doesn't happen. We call that the "cutoff frequency."
In general, a word or phrase can be used on more than one context, with different meanings in each context. Furthermore, different authors may use the same word in different ways, even though they agree on the mathematics that goes along with it. That's why it's important to tell us what you're reading about, and where you read it, and whatever equations go along with it, if any.
In this case, I can imagine "cutoff frequency" also being used to describe some kinds of electrical circuits, e.g. radio tuners.
So you probably know that when you shine light on a metal surface, it ejects electrons. As the frequency of the light increases, the maximum kinetic energy of the electrons increases. As the frequency of the light decreases, the maximum KE of the electrons decreases, and there is a certain frequency at which the maximum KE of the electrons becomes zero. Below that frequency, the photoelectric effect doesn't happen. We call that the "cutoff frequency."
In general, a word or phrase can be used on more than one context, with different meanings in each context. Furthermore, different authors may use the same word in different ways, even though they agree on the mathematics that goes along with it. That's why it's important to tell us what you're reading about, and where you read it, and whatever equations go along with it, if any.
In this case, I can imagine "cutoff frequency" also being used to describe some kinds of electrical circuits, e.g. radio tuners.
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Aafia
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Thanks
FAQ: What is the Cut-off Frequency and How Does it Affect Signal Processing?
What is the cut-off frequency and why is it important?
The cut-off frequency is a fundamental property of a filter or signal and refers to the frequency at which the output power is exactly half of the input power. It is important because it determines the frequency range that a filter can effectively attenuate or pass through, making it a crucial factor in the design and performance of electronic systems.
How is the cut-off frequency calculated?
The cut-off frequency can be calculated using the formula fc = 1/(2πRC), where fc is the cut-off frequency, R is the resistance in ohms, and C is the capacitance in farads. This formula is commonly used for RC filters, but there are different formulas for other types of filters.
What is the difference between a low-pass and high-pass filter cut-off frequency?
A low-pass filter has a cut-off frequency that determines the highest frequency that can pass through, while a high-pass filter has a cut-off frequency that determines the lowest frequency that can pass through. Low-pass filters attenuate high frequencies, while high-pass filters attenuate low frequencies.
How does the cut-off frequency affect the signal passing through a filter?
The cut-off frequency determines which frequencies are attenuated and which are passed through. Signals with frequencies below the cut-off frequency will pass through with minimal attenuation, while those above the cut-off frequency will be attenuated. This allows filters to selectively pass or block certain frequencies in a signal.
Can the cut-off frequency be adjusted or changed in a filter?
Yes, the cut-off frequency can be adjusted by changing the values of the components in the filter, such as resistors and capacitors. This allows for fine-tuning of the filter's frequency response to meet specific design requirements.