Studying Electromagnetic Radiation
A frequently asked question is “What is the relationship between wavelength, frequency, and energy?” Well simply The greater the energy the larger the frequency and the shorter the wavelength. Given the relationship between wavelength and frequency — the higher the frequency, the shorter the wavelength — it follows that short wavelengths are more energetic than long wavelengths. The wavelength and frequency of light are closely related. The higher the frequency, the shorter the wavelength. Because all light waves move through a vacuum at the same speed, the number of wave crests passing by a given point in one second depends on the wavelength. That number, also known as the frequency, will be larger for a short-wavelength wave than for a long-wavelength wave. The relationship between frequency and energy applies only to electromagnetic waves, and can only be understood in terms of the 'wave-particle duality' of light. All types of wave contain energy, as in the waves of the sea. However, the electro - magnetic waves that are light have a particular property that makes them different to other waves, the wave-particle duality. Waves have certain properties that particles do not have, and particles have properties that waves do not have. Waves can be refracted when passing from one medium to another with different density, as in the well-known apparent bending of light when a straight stick is immersed in water, and appears to be bent where it passes from air to water. A particle can have varying amounts of energy depending on its speed of motion, pressure and temperature. The discovery of the photoelectric effect showed that when light of a certain frequency falls on a photoelectric substance, the electrons that are caused to flow will always have energy that is proportional to the frequency of the light, and can only have this one value. This led to the conclusion that light acts like specific particles, called photons. A...
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