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Dec 28, 2020 · The frequency and period of a wave are two of the most important characteristics of any wave, whether it's a light wave or the sea waves lapping up on the shore. Frequency tells you the number of oscillations of something per unit of time, and period tells you the length of the oscillation.
Recall that the unit for frequency is hertz (Hz), and that 1 Hz is one cycle—or one wave—per second. The speed of propagation v w is the distance the wave travels in a given time, which is one wavelength in a time of one period.
- Ionizing Radiation
- Ultraviolet Light
- Visible Light
- Infrared Radiation
At one end of the electromagnetic spectrum, we find photons with a wavelength in the atomic and subatomic scale. These photons are the most energetic, as you can see at our photon energy calculator: so much that they can cause significant damage to other atoms or materials by forcefully knocking electrons awayfrom the negative cloud surrounding the...
Ultraviolet (UV) light is still energetic but not enough to be downright dangerous. It remains preferable to shield yourself a bit (Earth helps us by filtering most of the UV light coming from the Sun) using sunscreen and appropriate protection. Prolonged exposure to intense UV light can still damage the chemical bonds of the molecule in your body,...
Visible light, what we call light in our everyday conversation, is the portion of the electromagnetic spectrum that causes activation of our sensory cells in the eyes. We perceive different wavelengths as different colors, creating a rainbow. The first color is violet, corresponding to roughly a wavelength of 480nm480\ \mathrm{nm}480nm. We then pas...
At wavelengths greater than the one defining red light, we meet the infrared radiation. This low-energetic form of light is mostly responsible for heating: if you know the feeling of warmth in your skin when exposed to sunlight, even in the winter, then you know the effect of infrared radiation. Infrared light has wavelength between 780nm780\ \math...
The unit of frequency is hertz (Hz). and. wavelength. The length of a single wave, measured from one wave peak to the next. , according to the equation: \ (wave~speed~ = frequency \times ...
Frequency. Denoted ν, the frequency is the number of complete wave cycles which pass a given point in space in one unit of time (one second). It is the inverse of the period of the wave (and has units of inverse time, or 1 Hertz = 1 second -1), and is given by ν = v/λ.
The SI unit for the period, as for all measurements of time, is the second. [5] A traditional unit of frequency used with rotating mechanical devices, where it is termed rotational frequency , is revolution per minute , abbreviated r/min or rpm.
frequency. (\ (f\)) of a wave is the number of waves passing a point in a certain time. We normally use a time of one second, so this gives frequency the unit. hertz. (\ (Hz\)), since...
