10*4 = 40 metres per second
Light waves with the same phase and frequency are said to be coherent.
Wave speed = (wavelengtth) x (frequency) = (10) x (110) = 1,100 meters per second
Vacuums don't have frequencies.Electromagnetic waves moving through vacuums have frequencies and wavelengths.They also have speed. Regardless of their frequency and wavelength, their speed is always299,792,458 meters per second.The wavelength of an electromagnetic wave is [ (its speed) divided by (its frequency) ].If its frequency is 1.01 Hz, then its wavelength is 296,824,215.8 meters (about 184,438 miles).
At 20 degrees Celsius or 68 degrees Fahrenheit the speed of sound c = 343 m/s. Wavelength lamda is 0.667 meters. Frequency f = c / lambda = 343 / 0.667 = 514.24 Hz.
Take a deep breath and read through this. Doppler effect happens because there is relative motion between a wave source and an observer, and this changes the "rate" at which the crests and troughs of the wave arrive at the observer, and, therefore, the period of the wave. That's why it happens, so now let's translate it. We'll assume a source and an observer, and then take it from there. When a wave source, whether the wave is light (electromagnetic) or sound (mechanical) or other, the wave leaves the source and travels to the observer. If there is no relative motion between the source and observer, that is, if the distance between them is not increasing or decreasing, then the wave arrives at the observer as it left the source. There will be crests and troughs arriving "on schedule" according to the period of the wave. The period of a wave, you'll recall, is the time it takes for one complete cycle of the wave. Anyway, crests will be arriving (each followed by a trough) one after the other with a fixed amount of time between them (the period) that was dictated by the source. Now let's look at the picture with some relative motion. With the distance between the source and observer decreasing because one or both is moving and they are getting closer, something happens to the "timing" of the wave. Remember that the crests were arriving with a fixed amount of time between them, which was the period of the wave. When the the distance between the source and observer is decreasing, the observer can be seen to be moving "toward" the next crest. The observer is "hurrying to meet" the next crest, and will "get to the crest" before it would have gotten to him if he was just waiting for it. Make sense? Let's look at it another way. The time between the arriving crests as seen by an observer who is moving toward a source is shorter than it would be if he was just "waiting" for the next crest to arrive. He'll "go to meet it" and the period will be shorter. The shorter period translates into a high frequency. And even though the source is not creating the wave at that higher frequency, the observer is still observing (seeing or hearing) the wave at that higher frequency. The observation is "real" in that if the period of the wave is measured, it is shorter than it was. The change in the frequency, that shift in the frequency of the wave, is called Doppler shift. And it's really that simple.
Light waves with the same phase and frequency are said to be coherent.
Wave speed = (wavelengtth) x (frequency) = (10) x (110) = 1,100 meters per second
The speed of a wave is equal to its wavelength times its frequency. Since you are using SI units, the answer will be in meters/second.
The speed of sound varies with temperature. At commonly experienced temperatures, it's about 343 meters/sec. Frequency = speed/wavelength = 343/0.686 = 500 Hz
Vacuums don't have frequencies.Electromagnetic waves moving through vacuums have frequencies and wavelengths.They also have speed. Regardless of their frequency and wavelength, their speed is always299,792,458 meters per second.The wavelength of an electromagnetic wave is [ (its speed) divided by (its frequency) ].If its frequency is 1.01 Hz, then its wavelength is 296,824,215.8 meters (about 184,438 miles).
speed = distance over time = wavelength times frequency = 2 m times 10 hz = 20 m hz = 20 meters per second.
The formula for a wave in this case is: speed = frequency x wavelength. Since Hz = 1/second, the answer will be in meter/second.
At 20 degrees Celsius or 68 degrees Fahrenheit the speed of sound c = 343 m/s. Wavelength lamda is 0.667 meters. Frequency f = c / lambda = 343 / 0.667 = 514.24 Hz.
A standing wave is a wave produced by interference between two moving waves of the same frequency (usually an original wave and its reflection) which does not move but continues to oscillate at the original frequency.
TAE
IF a wave moving at a constant speed were to have it's wavelength doubled (Wavelength x 2), then the frequency of the wave would be half of what it originally was (Frequency / 2).
The range of frequency of sound that coal trains emit when moving hovers around 20 Hz to 20,000 Hz