littlepapa87 said:Can r be any position in space
or must it lie on the wave?
An electromagnetic wave is a type of energy that travels through space in the form of electric and magnetic fields. These waves are created by the movement of electrically charged particles, and they can travel through vacuum as well as through various mediums such as air or water.
An electromagnetic wave consists of two perpendicular components - an electric field and a magnetic field. The electric field is responsible for the movement of charged particles, while the magnetic field is perpendicular to the electric field and helps to maintain its oscillation.
The wavelength of an electromagnetic wave is the distance between two consecutive peaks or troughs of the wave. It is usually measured in meters and can range from very small values (such as gamma rays) to very large values (such as radio waves).
The frequency of an electromagnetic wave is the number of oscillations per second of the electric and magnetic fields. It is measured in hertz (Hz) and is inversely proportional to the wavelength. This means that longer wavelengths have lower frequencies and vice versa.
The energy of an electromagnetic wave is directly proportional to its frequency. This means that waves with higher frequencies (such as x-rays and gamma rays) have more energy than waves with lower frequencies (such as radio waves and microwaves). This relationship is described by the equation E = hf, where E is energy, h is Planck's constant, and f is frequency.