What is the frequency of light if its wavelength is 700 nm?
925293
c = lambda x nu\n\nc is the speed of light 3.0 x 10^8 m/s\n\nlambda is the wavelength\n\nnu is the frequency
517715
Yes, if L is wavelength, then it is L/2.
928544
KNOWN:\nf = 3.2 x 10^-2 Hz\nc (ie speed of light) = 3.00 * 10 ^8 m/s\n\nFIND L (AKA wavelength)\nL m = c m/s  /  f Hz\n= 3.00 * 10 ^8 m/s  /  3.2 x 10^-2 Hz\n= 9 375 000 kilometers\n\nAre you sure its 10^-2 Hz? That seems unlikely
692212
f = v / lambda -> lambda = v / f\n\nv = velocity\nf = frequency\nlambda = wavelenght\nv in vacuum = c = 3 x 10^8 m/s\n\nlambda = 3 x 10^8 / 6 x 10^14 = 0.5 x 10^-6 m= 500 x 10^-9 m = 500 nm
58422
A typical human eye will respond to wavelengths between 400 and 700 nm.  Some may be able to perceive from 380 to 780 nm.
698460
Assume microwaves travel at the speed of light...\n\nv = 300,000,000 m/s\nwavelength(lambda) = 16 cm = .16 m\n\nFrequency = v/lambda\n\nFreq. = 300,000,000/.16\n\nFreq. = 1.875E9 Hz... or 1.875 GHz
750681
A photon with a wavelength of about 650 nm
668241
Violet (about 400 nm) [for visible light (380 THz to 750 THz)]
943929
The frequency of light and its wavelength have an inverse relationship.  As the frequency of light increases, the wavelength decreases.\nThe frequency is the number of 'cycles' per unit time, and the wavelength is how far the wave propagates in that same time.  At a constant speed, the shorter the higher the frequency (very short time durations between cycles), the smaller the wavelength.\n\nThe energy contained within a single photon of light is given by Planck's equation,\nE = hv\nwhere E is the energy, h is Planck's constant, and v is the frequency of light.\nThe equation can be re-written as,\nE = h * c / lambda\nWhere c is the speed of light in a vacuum, and lambda is the wavelength of light.\n\nYou can see that as the frequency of the light increases (or when the wavelength decreases), the energy contained within a photon of light increases.  The higher the frequency of light, the more energy the light carries.  For example, high frequency X-rays carry much more energy than low frequency radio waves.\n\nh = 6.626 E-34 J s
937514
wavelength = speed of light / frequency\nfrequency = speed of light / wavelength\nf = (3*10^8 m/s) / (615*10^-9 m)\nf = 4.878*10^14 Hz\n\nwavelength = planck's constant * speed of light / energy\nenergy = planck's constant * speed of light / wavelength\nE = (6.626*10^-34 J*s) * (3*10^8 m/s) / (615*10^-9 m)\nE = 3.232*10^-19 J
890524
Red = 625 to 760 nm\nOrange = 585 to 620 nm\nYellow = 565 to 590 nm\nGreen = 520 to 570 nm\nBlue = 440 to 490 nm\nIndigo = 420 to 440 nm\nViolet = 380 to 420 nm\n\nThese are approximate wavelengths for the visible spectrum in nanometers (notice how some values overlap). Taken from Wikipedia.
1088047
infared light. frequency: above 700nm(in greece we use nm. i dont konw elswhere what the use).\nUses: In photography to take a photo through clouds, to warm objects(metals)\nDangers: i dont think there are\n\nultraviolet: under 400nm\nUses: To clean(and removes mirco-organisms) from medicine tools.\ndangers: it may cause skin cancer if exposed for a long time.\n\nI dont remember anything. It's been a year since i last read 'em\nHope i helped
1094514
Light waves can have harmonic frequencies, but it's not what you are thinking.  When someone refers to a light harmonic, stop thinking about the sound analogy and start thinking about lasers.  In order for a laser to be an effective analytical tool (if you are interested in this, do some research on Raman Spectroscopy, Time Resolved Laser induced Fluorescence Spectroscopy, and Laser Induced Breakdown Spectroscopy) one needs to be able to produce a specific wavelength of light.  While this may seem an easy thing to do, it is quite complicated.  \n\nBack to the harmonic.  The harmonic can be described as a frequency doubling stage.  For example, as a 1064 nm laser is passed through a harmonic generator, it's frequency is doubled and the resulting beam exits at 532 nm.  This change is referred to as generating a second harmonic (relative to the original beam).  This is considered a light harmonic.\n\nThis process can be repeated, but the solution may non-intuitive depending on the setup.  If the 532 beam is then passed through a "second harmonic generator" the output is 266 nm (as you would expect).  This beam has a frequency that is double the entering beam and four times the original.  However, another setup is to place a "third harmonic generator" in the line.  As the 532 nm beam enters, a 355 nm beam exits.  This beam now has a frequency three times that of the original, not the entering beam.  \n\nHarmonic generators can go as high as a fourth harmonic generator (I'm not aware of higher generators, though they may exist).  These generators are useful for taming something like a CO2 laser which excite around 9400 and 10600 nm.\n\nAs for applications, these beams can then be put into a variety of devices for tuning the beam.  As a spectroscoper, we use an OPO (Optical Parametric Oscillator) to take the 355 beam and tune it to a variety of frequencies.
741723
De Broglie wavelength L = (h/mv) sqrt( 1-v^2/c^2).\n\nSquare, solve for v = hc /sqrt(mc^2 L^2 + h^2) \nH = Planck's constant\nc = the speed of light\nm = mass
229632
The speed of light pertains to E&M waves... You can have a wave on a rope for example... it will not be travelling at the speed of light.  To generalize, just state it as 'velocity'\n\nwavelength = velocity/frequency\n\nfor units in this case, x millimeters = (y millimeters/second)/(z cycles/second)
293737
The fundamental frequency in the Universe is the Ryhsmonic (aetheric) frequency f* which is equal to 1/T* or 1/5.391 x 10-44 sec. which is about 1.855 x 1043 Hz.
733204
period =t=1/f=1/256=.00391 seconds\n\nv=lf                            l=lambda=wavelength\n\nl=v/f=340/256=1.328meters