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Light - Coggle Diagram
Light
The Interaction of Light and Matter
Reflection occurs when light waves come in contact with the surface of a material and bounce off.
Transmission occurs when light waves travel through a material.
Absorption occurs when interactions with a material convert light energy into other forms such as thermal energy.
Transparent lets light through
translucent is blurry
opaque does not let light through
Light-An Electromagnetic Wave
Light is a type of Electromagnetic Wave
electromagnetic waves can travel through matter
Light travels through a vacuum at a speed of about 300,000
Km/s.
light waves slow down when they travel through matter
light waves are 900,000 times faster than sound waves
The Electromagnetic Spectrum
x-rays and radio waves are another type of electromagnetic waves
electromagnetic waves are classified by their wave lengths, this is called the electromagnetic spectrum
light waves are measured in nanometers
You see different colors when different wavelengths of light waves enter your eyes.
The Reflection of Light Waves
the angle of incidence always equals the angle of reflection
lines perpendicular to a surface is called normal
the angle between the incoming light ray and the normal is the angle of incidence
Light-Emitting Objects
a light source is something that emits light
to emit light a lightbulb changes electric energy to light energy
Light Rays
light rays are a narrow beam of light that travels in a straight line
unless light rays come in contact with a surface it always travels in a straight line
Light Reflection
other objects can reflect light
to see something that is not a light source the bject must reflect light into your eyes
Seeing Objects
light rays travel directly from the light source into your eyes
light rays are reflected in multiple directions
The Refraction of Light Waves
a wave changes direction when traveling from one surface to another
light waves travel at different speeds with different objects
What Is Light
Eyes sense Light waves
Scattering
dust particles reflect light waves in many different directions which is scattering