For any electromagnetic wave, the wavelength depends on the frequency, but the
speed doesn't. They all have the same speed. It's 300 million meters per second,
regardless of the frequency.
The wavelength at 3 GHz is 10 centimeters.
Wavelength = (speed) divided by (frequency)= (3 x 108) / (3 x 109) = 0.1 meter = 10 centimeters
Electromagnetic Frequency (EMF) & Radio Frequency (RF)
The frequency of radar waves can be calculated using the formula: speed of light = frequency x wavelength. Given the wavelength of 3.2 cm, you can convert it to meters (0.032 meters) and use the speed of light in a vacuum (3 x 10^8 m/s) to solve for frequency. The frequency of radar waves in this case would be approximately 9.375 GHz.
Frequency = speed / wavelength = 3 x 108/0.001 = 300 GHz . (rounded)Most folks would call that a "millimeter wave" or a "darnedshort microwave", not light. It's certainly not visible.
The frequency range reserved for radio waves is typically below 3 kHz, while the microwave frequency range starts from about 300 MHz (not kHz) and extends to 300 GHz. Within this range, different applications and technologies utilize specific frequency bands to ensure efficient and interference-free communication.
Wavelength = (speed) divided by (frequency)= (3 x 108) / (3 x 109) = 0.1 meter = 10 centimeters
"Microwave" radiation is any radio wave at frequencies between 3 GHz and 300 GHz. Microwave cooking ovens are licensed to operate at a certain definite frequency, just like any other radio transmitter is. For microwave ovens in the US, the frequency is 2.450 GHz.
EM radiation with a wavelength of 15 cm has a frequency of 1.9987 GHz. (Giga Hertz) or close enough to 2GHz. Technically this is in the UHF (Ultra High Frequency) section of the radio spectrum which is 300MHz to 3GHz.
The formal definition of "microwave" is any frequency greater than 3 GHz. (Wavelength less than 10 centimeters.) Frequency bands allocated for microwave radio communication in the US are found in the neighborhoods of 6, 11, 13, 18, 23, 24, 27, and 38 GHz. Note: It looks like the the formal definition of "microwave" doesn't include microwave ovens ... they operate at 2.45 GHz.
3 GHZ TO 30 GHZ
"Microwave" is the official label for radio between 3 GHz and 300 GHz. That frequency range corresponds to wavelengths from 1 millimeter to 10 centimeters.
For any wave,Frequency = (wave speed) / (wavelength)For your wave:Frequency = (3 x 10^8 meters per second) / (0.01 meter) = 3 x 10^10 per second = 30 GHz
Wavelength = (speed) / (frequency)Speed of light/radio/microwave = 3 x 108 meters per secondWavelength in the microwave oven = (3 x 108) / (2.4 x 109) =0.125 meter12.5 centimeters125 millimeters125,000,000 nanometersabout 4.9 inches
velocity.,i.e., speed = frequency X wavelength wavelength=velocity/frequency=(3X108m/s)/(3X109/s)=0.1m
"Microwave" IS radio waves. They're called microwaveswhen their frequency is 3 GHz or higher.
Electromagnetic Frequency (EMF) & Radio Frequency (RF)
"Microwave" is the loose term used to describe the higher-frequency portion of the general category of radio waves. The closest thing to a formal definition says that "microwave" is anything with a frequency higher than 3 GHz (wavelength less than 10 centimeters).