Physics Flashcards
Definitions!
What is the Electromagnetic Spectrum!
The range of frequencies of electromagnetic radiation and their respective wavelengths.
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What is Frequency!
The number of waves that pass in a specific unit of time!
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What is Energy!
The thing that travels in waves at the speed of light also referred to electromagnetic radiation.
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Electromagnetic Radiation
A kind of radiation including visible light, radio waves, gamma rays, and X-rays, in which electric and magnetic fields occur at the same time.
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Wave Model Of Light
The wave model of light pictures lights traveling as a wave.
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Ray Model Of Light
Light is represented as a ray that travels in a straight path, the direction of which can be changed only by placing an obstruction in the path.
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Reflection
The return of light or sound waves from a surface
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Absorption
The transfer of the energy of a wave to matter as the wave passes through it.
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Transmission
Transmission of light is the moving of electromagnetic waves whether visible light, radio waves, ultra violet etc. through a material.
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Wavelength
Wavelength is the distance between identical points like trough to trough or crest to crest
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Transparent, Translucent, Opaque
Transparent objects allow all light to pass through it.
Translucent objects allow some light to pass through it.
Opaque objects allow almost no light to pass through it.
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Refraction
The changes in the direction of a wave passing from one medium to another are caused by its change in speed.
Definitions! Ray Diagram (Incident + Reflected)
In the diagram, the ray of light approaching the mirror is known as the incident ray. The ray of light that leaves the mirror is known as the reflected ray
