Is electromagnetic wave which can transmit without medium. Light can transmit in vacuum room. In the past, light used to be thought as particle lines transmitted by light sources. This idea was conveyed by Newton. But this idea was perfected by Christian Huygens, which stated that light is electromagnetic wave.
The Speed of Light
In vacuum is 3 x 108 m/s. The first person who wants to measure the speed of light is Galileo. However, he failed in the experiment. And the next, the experiment of measuring speed of light was done by Jean Foucalt (a France). He was successful to measure the speed of light up to 300.000 km/s. But the person who was successful to measure speed of light in high accuracy is Michelsen (an American). He measure the speed of light is 2,99729 x 108 m/s (made to be 3 x 108 m/s).
Light Reflection
Diffuse Reflection = A Reflection which occurs when a light goes to an unflat area. The light will be reflected irregularly and spreads in any directions.
Regular Reflection = Regular reflection is reflection which occurs at reflecting area which is flat. The lights that are reflected are still parallel or regular.
Law of Light Reflection
The light which goes to an area will get light reflection law, according to Snellius;
Incident ray, normal line, and reflection ray located at one plane area
Incident angle (i) is equal to reflection angle (r)
E-Sewaka Dharma Award
E-Sewaka Dharma Award
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