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  1. Aug 27, 2024 · Light energy, also known as radiant energy, is a form of energy that is visible to the human eye and is emitted by sources such as the sun, light bulbs, and lasers.It travels in waves and is part of the electromagnetic spectrum, which includes other types of waves such as radio waves, microwaves, infrared radiation, ultraviolet radiation, X-rays, and gamma rays.

    • Radio
    • Microwaves
    • Infrared
    • Visible Light
    • Ultraviolet
    • X-Ray
    • Gamma Ray

    Radio waves have the longest wavelengths in the electromagnetic spectrum. Radio wavelengths can be as long as a soccer pitch, or as long as the diameter of our planet! Radio waves have allowed us to communicate via radio, satellites, cell phones, television, and more, for several decades. Yet, despite their significance, radio waves are invisible t...

    Though technically microwaves are a band or portion of the higher frequency side of the radio spectrum, they’re used in different technologies than radio waves. Microwaves have much shorter wavelengths than radio waves, and they can be used to penetrate through rain, snow, clouds, smoke, and more. In wireless communications, they are used for Bluet...

    You’ve probably seen infrared light used in night vision cameras. These cameras typically use near-infrared, “near” meaning the frequency is close to the visible spectrum, which is visible to our eyes. Some cameras use thermal imaging, which is infrared at longer wavelengths. In this light, objects which are warmer appear red, or even white, while ...

    Visible light refers to the band of the electromagnetic spectrum that’s visible to our eyes. The light waves in the visible spectrum can be broken down into 6 colors. The Visible Light Spectrum At 700 nanometers, red light has the longest wavelengths of all of the visible spectrum, while the wavelengths in violet measure around 400 nanometers. The ...

    You may have heard about the harmful effects of ultraviolet from the sun. In fact, we wear sunscreen to protect our skin, and sunglasses to protect our eyes from burning, because of the dangers of this invisible light wave. But did you know that ultraviolet is also responsible for promoting vitamin D production in most living things? Most people do...

    Most of us probably first came across the word “x-ray” when we learned our alphabet. But x-rays are used for more than just radiography. X-ray light waves are used in radiotherapy, astronomy, and security. Because x-ray wavelengths are short and high frequency, they are highly penetrating. This makes x-rays incredibly effective for seeing places we...

    Gamma rays have the shortest wavelengths, as well as the highest frequency in the electromagnetic spectrum. They have the most energy out of all the light waves, and are usually produced by extremely hot and violent objects and events in our universe. For example, supernova explosions, nuclear explosions, and lightning all create gamma rays. But ga...

  2. Dec 7, 2022 · Light has the properties of waves. Like ocean waves, light waves have crests and troughs. The distance between one crest and the next, which is the same as the distance between one trough and the next, is called the wavelength. The frequency of a wave is the number of crests (or troughs) that pass a point in one second.

  3. Mathematics and experiments show that light is a transverse wave – the electric and magnetic field vectors point in directions that are perpendicular to the direction of motion of the light wave (and as it turns out, they also rare always perpendicular to each other). Figure 3.1.1 – Electromagnetic Wave. The red arrows in the figure above ...

  4. Aug 14, 2023 · Waves. A wave is an oscillation or periodic movement that can transport energy from one point in space to another. Common examples of waves are all around us. Shaking the end of a rope transfers energy from your hand to the other end of the rope, dropping a pebble into a pond causes waves to ripple outward along the water's surface, and the expansion of air that accompanies a lightning strike ...

  5. Sep 9, 2024 · Electromagnetic waves are energy waves that travel through space, consisting of oscillating electric and magnetic fields perpendicular to each other. They include radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays. These waves can travel through a vacuum at the speed of light and are essential in technologies ...

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  7. 29. Light waves – Conceptual Physics. 29. Light waves. Summary. Light has many fascinating properties and interacts in many meaningful and useful ways. By treating light as a wave and understanding its wave properties, we can learn about even more properties and applications of light in our lives.

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