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The wavelength of 100 ev is 1.25uevm/100ev= 12.5 nm (nanometer).
3000000m
Frequency = speed/wavelength = 300,000,000/3 = 100 MHz.
velocity = frequency × wavelength frequency = velocity / wavelength f= 100 /20 f= 5 Hz
Less than that of visible light. The Wikipedia lists a wavelength between about 100 and 310 nm.
Wavelength = speed/frequency = 300,000,000/100,000,000 = 3 meters
Frequency = speed/wavelength = 300,000,000/3 = 100 MHz.
1 GHz
The unit of frequency is always 'reciprocal time' ... "per second", "per minute", "per hour", etc.,no matter what the speed or wavelength may be.Examples:Speed = 10 meters per second, wavelength = 2 meters.Frequency = (speed) / (wavelength) = (10 meters / sec) / (2 meters) = 5 per second.Speed = 100 yards per hour, wavelength = 1 mileFrequency = (speed/wavelength) = (100 yd/hour) / (1 mile) =(100 yd/hour-mile)x(1 mile/1760 yd) = (100/1760) per hour.Speed = 60 ft/sec, wavelength = 1 inchFrequency = (speed/wavelength) = (60 ft/1 inch-sec) x (12 inch/ft) = 720 per sec.
Speed of electron as compared to speed of light is: n = 15% c = 299792458 [m/s] v = c*n/100 = 4.5 *10^7 [m/s] So corresponding wavelength as given by the de Broglie equation: h - Planck's constant, m0 - the mass of the electron at zero velocity; lambda = h/p = h/(v*m0) = 6.62606876*10^-34/(4.5 *10^7*9.10938188*10^-31) = 1.61642*10^-11 [m] = 0.16 [angstroms]
It is mostly related to the energy of the electron.
The mass and velocity of an object do not determine its wavelength: it could be travelling in a straight line!