Frequency

• The seven types of electromagnetic waves are arranged in an electromagnetic spectrum from radio waves to gamma rays, with the wavelength decreasing but the frequency increasing.
• Frequency in physics is the number of cycles or vibrations that occur in one unit of time, usually in seconds, and is symbolized by the small letter f and expressed in hertz.
• Energy in physics is the capacity to do work and is symbolized by capital letter e and is expressed in joules.
• The speed of light in vacuum, symbolized by letter c, is equivalent to 3 times 10 raised to 8 meters per second or 300 million meters per second.
• Planck's constant, symbolized by small letter h, is equivalent to 6.63 times 10 raised to negative 34 joules second.
• If you are asked to solve for the wavelength or the frequency, you can use a triangle to place letter c on the top part and then lambda and f at the bottom, and the equation will be equal to c over f.
• The wavelength of a radio wave can also be found by using the formula lambda=c/f, where c is the speed of light, lambda is the wavelength, and f is the frequency.
• The frequency of a radio wave is given and the wavelength is asked for, using the speed of light as a constant, the formula is c=lambda f, where c is the speed of light, lambda is the wavelength, and f is the frequency.