https://padlet.com/12238362/v1j11la50ing joshua davis en-us 2016-12-20 18:15:36 UTC 2016-12-20 18:41:41 UTC hello@padlet.com 12238362 https://padlet.com/12238362/v1j11la50ing/wish/144510355 as the wavelengths of electromagnetic waves get shorter, their energy increases. Gamma rays are the shortest waves in the spectrum and, as a result, have the most energy. Gamma rays are sometimes used in treating cancer and in taking detailed images for diagnostic medicine. Gamma rays are produced in high energy nuclear explosions and supernovas. ]]> 2016-12-20 18:21:37 UTC https://padlet.com/12238362/v1j11la50ing/wish/144510355 12238362 https://padlet.com/12238362/v1j11la50ing/wish/144510501 X-rays have even shorter wavelengths than ultraviolet rays. At this point in the electromagnetic spectrum, scientists begin to think of these rays more as particles than waves. X-rays were discovered by German scientist Wilhelm Roentgen. They can penetrate soft tissue like skin and muscle and are used to take X-ray pictures of bones in medicine. 

]]> 2016-12-20 18:22:37 UTC https://padlet.com/12238362/v1j11la50ing/wish/144510501 12238362 https://padlet.com/12238362/v1j11la50ing/wish/144510895 Ultraviolet waves have the next shortest wavelength after visible light. It is ultraviolet rays from the Sun that cause sunburns. We are protected from the Sun's ultraviolet rays by the ozone layer. Some insects, such as bumblebees, can see ultraviolet light. Ultraviolet light is used by powerful telescopes like the Hubble Space Telescope to see far away stars.]]> 2016-12-20 18:25:07 UTC https://padlet.com/12238362/v1j11la50ing/wish/144510895 12238362 https://padlet.com/12238362/v1j11la50ing/wish/144511458 The visible light spectrum covers the wavelengths that can be seen by the human eye. This is the range of wavelengths from 390 to 700 nm which corresponds to the frequencies 430-790 THz. You can go here to learn more about the visible spectrum. ]]> 2016-12-20 18:29:00 UTC https://padlet.com/12238362/v1j11la50ing/wish/144511458 12238362 https://padlet.com/12238362/v1j11la50ing/wish/144511550 Between microwaves and visible light are infrared waves. Infrared waves are sometimes classified as "near" infrared and "far" infrared. Near infrared waves are the waves that are closer to visible light in wavelength. These are the infrared waves that are used in your TV remote to change channels. Far infrared waves are further away from visible light in wavelength. Far infrared waves are thermal and give off heat. Anything that gives off heat radiates infrared waves. This includes the human body! ]]> 2016-12-20 18:29:35 UTC https://padlet.com/12238362/v1j11la50ing/wish/144511550 12238362 https://padlet.com/12238362/v1j11la50ing/wish/144511673 Radio waves have the longest wavelengths of all the electromagnetic waves. They range from around a foot long to several miles long. Radio waves are often used to transmit data and have been used for all sorts of applications including radio, satellites, radar, and computer networks. ]]> 2016-12-20 18:30:20 UTC https://padlet.com/12238362/v1j11la50ing/wish/144511673 12238362 https://padlet.com/12238362/v1j11la50ing/wish/144511811 are waves where the disturbance moves in the same direction as the wave. One example of this is a wave moving through a stretched out slinky or spring. If you compress one portion of the slinky and let go, the wave will move left to right. At the same time, the disturbance (which is the coils of the springs moving), will also move left to right. Another classic example of a longitudinal wave is sound. As sound waves propagate through a medium, the molecules collide with each other in the same direction as the sound is moving. ]]> 2016-12-20 18:31:07 UTC https://padlet.com/12238362/v1j11la50ing/wish/144511811 12238362 https://padlet.com/12238362/v1j11la50ing/wish/144511926 Are waves where the disturbance moves perpendicular to the direction of the wave. You can think of the wave moving left to right, while the disturbance moves up and down. One example of a transverse wave is a water wave where the water moves up and down as the wave passes through the ocean. Other examples include an oscillating string and a wave of fans in a stadium (the people move up and down while the wave moves around the stadium). ]]> 2016-12-20 18:31:50 UTC https://padlet.com/12238362/v1j11la50ing/wish/144511926 12238362 https://padlet.com/12238362/v1j11la50ing/wish/144512104 are waves that require a medium. This means that they have to have some sort of matter to travel through. These waves travel when molecules in the medium collide with each other passing on energy. One example of a mechanical wave is sound. Sound can travel through air, water, or solids, but it can't travel through a vacuum. It needs the medium to help it travel. Other examples include water waves, seismic waves, and waves traveling through a spring. ]]> 2016-12-20 18:32:55 UTC https://padlet.com/12238362/v1j11la50ing/wish/144512104 12238362 https://padlet.com/12238362/v1j11la50ing/wish/144512198 Are waves that can travel through a vacuum (empty space). They don't need a medium or matter. They travel through electrical and magnetic fields that are generated by charged particles. Examples of electromagnetic waves include light, microwaves, radio waves, and X-rays. ]]> 2016-12-20 18:33:24 UTC https://padlet.com/12238362/v1j11la50ing/wish/144512198 12238362 https://padlet.com/12238362/v1j11la50ing/wish/144512339 How many waves can pass a given point per second, measured in Hertz (Hz).]]> 2016-12-20 18:34:13 UTC https://padlet.com/12238362/v1j11la50ing/wish/144512339 12238362 https://padlet.com/12238362/v1j11la50ing/wish/144512513 Microwaves are shorter than radio waves with wavelengths measured in centimeters. We use microwaves to cook food, transmit information, and in radar that helps to predict the weather. Microwaves are useful in communication because they can penetrate clouds, smoke, and light rain. The universe is filled with cosmic microwave background radiation that scientists believe are clues to the origin of the universe they call the Big Bang.

]]> 2016-12-20 18:35:11 UTC https://padlet.com/12238362/v1j11la50ing/wish/144512513 12238362 https://padlet.com/12238362/v1j11la50ing/wish/144512756 The distance from two corresponding (or the same) parts of a wave.]]> 2016-12-20 18:36:53 UTC https://padlet.com/12238362/v1j11la50ing/wish/144512756 12238362 https://padlet.com/12238362/v1j11la50ing/wish/144512937  A wave is a traveling disturbance that travels through space and matter transferring energy from one place to another. When studying waves it's important to remember that they transfer energy, not matter. ]]> 2016-12-20 18:38:07 UTC https://padlet.com/12238362/v1j11la50ing/wish/144512937