The electromagnetic radiations like radio waves, light waves or infrared (heat) waves have specific patterns as they travel through space and each wave has a certain shape and length. A wave consists of a series of peaks and troughs.
Understanding Longest Wavelength is always challenging for me but thanks to all math help websites to help me out.
Peaks are at the top, or crest, of the wave and troughs are at the bottom (lowest-point) of the wave. The distance between peaks (or high points) is called wavelength.Parts of a waveThe wavelength of a wave is the distance from one point on a wave to the next identical point and is usually measured from peak to peak or trough to trough.
The amplitude of the wave is the half-height of the wave, measured from the mid-point of the wave to the peak or the mid-point to the trough. The frequency of a wave is taken by the number of waves that pass a point in one second. The speed of a wave is equal to the frequency of the wave multiplied by the wavelength of the wave.Wavelength or Length of a Wave is the distance between crests. If the frequency is higher, the wavelength will be shorter.
The length of an electromagnetic waveform, wavelength (λ) is always inversely proportional to its frequency (f), the number of cycles per second. As the frequency of the signal increases, the wavelength decreases. In other words, as more waveforms transmitted per second, the shorter will be the length, or cycle, of each individual wave. Or as the frequency doubles, the wavelength will be halved.
The wavelength is calculated using the formula given below:λ = c / f where λ = wavelength (m)c = speed of sound (m/s)f = frequency (s-1, Hz)The frequency - cycles per second - is expressed in hertz - Hz. The frequency can be expressed as shown below:f = 1 / T where f = frequency (s-1, Hz)T = time for completing one cycle (s).Comparison of wavelength and frequencyWave length of visible lightFrequency and wavelength of visible light and sound waves:The nature of the various forms of radiant energy from the electromagnetic spectrum is determined by the wavelength.
The wavelength (in metres) of electromagnetic waves can be computed by the speed of light divided by frequency(λ = c / f ≈ 300,000,000/ frequency).Wavelength is directly proportional to the velocity of propagation and is inversely proportional to frequency. Since sound propagates much more slowly through air than EM waves propagate through space or atmosphere, the wavelengths of sound waves are much smaller for the same frequencies.For sound waves, the wavelength is determined by v/f where v is the speed of wound wave in air and f the frequency. The frequencies (measured in Hz or cycles per second) of the audible vibrations are between 20 Hz and 20000 Hz. Wavelength of Visible Light or the wavelengths of light that humans can see range from approximately 400 nm to 750 nm.