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Light - Coggle Diagram
Light
The Interaction of Light and Matter
Transmission
Reflection
Absorption
Something is transparent if almost all light is able to pass through it and provide a clear message
Something is transparent if most light is able to pass through but forms a blurry image.
Something is opaque if no light passes through it.
The Law of Reflection
The angle of incidence is always equal to the angle of reflection.
The angle between the normal and the incoming light ray is the angle of incidence
The normal is always perpendicular to the surface
Scattering
Scattering is caused when a ray of light is scattered into many directions.
For example, when light hits dust particles, they reflect light so they reflect it into many different diretions.
Refracting
Refracting is caused when light changes direction when traveling into different materials.
Light: Electromagnetic Wave
Light can travel through matter like sound, but it can also travel through vacuum like space.
In Vacuum, Light travels at a speed of about 300,00 km/s, but it slows down when traveling through matter. Light travels much faster than sound. In air, Light travels about 900,000 times faster than the speed of sound.
The Electromagnetic Spectrum
The Electromagnetic Spectrum consists of light and other electromagnetic waves. For example, X-rays, gamma rays, and radio waves are all examples of electromagnetic waves. They are in order by wavelength.
Light waves are extremely small at about 400-700 nano meters of length.
You see different colors when different wave lengths of light hit your eyes.
Light can be seen by your eyes from being reflected or from being emitted.
A light source is something that emits light.
Light sources convert other sources of energy into light energy.
When emitting light, the light source sends out light rays, which are narrow beam of light moving in a straight line, in all directions.
In order for an object to be seem that isn't a light source, it must be able to reflect light from a source into your eyes.