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  1. 頻譜 (frequency spectrum)是指一個 時域 的 信號 在 頻域 下的表示方式,可以針對信號進行 傅立葉變換 而得,所得的結果會是分別以 振幅 及 相位 為縱軸, 頻率 為橫軸的兩張圖,不過有時也會省略相位的資訊,只有不同頻率下對應振幅的資料 [2] 。

  2. The frequency spectrum of an electronic driven pacemaker, however, is a line spectrum. A periodic waveform occupies a line spectrum; an aperiodic waveform occupies a continuous frequency spectrum. There are several ways of finding the frequency spectrum of a time domain waveform, periodic or aperiodic.

  3. Jul 4, 2024 · 频谱 (frequency spectrum)是一个 时域 的 信号 在 频域 下的表示方式,可以针对信号进行 傅里叶变换 而得,所得的结果会是分别以 幅度 及 相位 为纵轴, 频率 为横轴的两张图,不过有时也会省略相位的信息,只有不同频率下对应幅度的资料 [2] 。

  4. The electromagnetic spectrum is the full range of electromagnetic radiation, organized by frequency or wavelength. The spectrum is divided into separate bands, with different names for the electromagnetic waves within each band.

  5. Feb 20, 2022 · Draw a simplified electromagnetic spectrum, indicating the relative positions, frequencies, and spacing of the different types of radiation bands. List and explain the different methods by which electromagnetic waves are produced across the spectrum.

  6. 頻譜 (frequency spectrum)是指一個 時域 的 訊號 在 頻域 下的表示方式,可以針對訊號進行 傅立葉變換 而得,所得的結果會是分別以 振幅 及 相位 為縱軸, 頻率 為橫軸的兩張圖,不過有時也會省略相位的資訊,只有不同頻率下對應振幅的資料 [2] 。 有時也以「振幅頻譜」表示振幅隨頻率變化的情形,「相位頻譜」表示相位隨頻率變化的情形 [3] 。 簡單來說,頻譜可以表示一個訊號是由哪些頻率的弦波所組成,也可以看出各頻率弦波的大小及相位等資訊。 簡介 [ 編輯] 訊號若隨著時間變化,且可以用振幅來表示,都有其對應的頻譜。 包括 可見光 ( 顏色 )、 音樂 、 無線電波 、 振動 等都有這様的性質。 當這些物理現象用頻譜表示時,可以提供一些此訊號產生原因的相關資訊。

  7. Aug 29, 2023 · The electromagnetic spectrum is the range of all possible frequencies of electromagnetic radiation. It provides a way of categorizing the vast array of electromagnetic waves that occur in the universe, from the lowest frequencies used for radio communication to the highest frequencies that ionize atoms.

  8. May 27, 2024 · electromagnetic spectrum, the entire distribution of electromagnetic radiation according to frequency or wavelength. Although all electromagnetic waves travel at the speed of light in a vacuum, they do so at a wide range of frequencies, wavelengths, and photon energies.

  9. The microwave portion of the electromagnetic spectrum can be subdivided into three ranges listed below from high to low frequencies: extremely high frequency (30 to 300 GHz), super high frequency (3 to 30 GHz), and ultra-high frequency (300 MHz to 3 GHz).

  10. Aug 10, 2016 · Electromagnetic energy travels in waves and spans a broad spectrum from very long radio waves to very short gamma rays. The human eye can only detect only a small portion of this spectrum called visible light. A radio detects a different portion of the spectrum, and an x-ray machine uses yet another portion.

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