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Quinn science O3
The Nature of Light
Question | Answer |
---|---|
electromagnetic wave | transmit energy, can travel through space or matter, consists of changing electric and magnetic fields |
radiation | the transfer of energy through matter or space as electromagnetic waves, such as visible light and infrared waves |
electromagnetic spectrum | the entire range of electromagnetic waves |
reflection | the bouncing back of a wave after it stirkes a barrier, mirror |
law of reflection | states that the angle of incidence is equal to the angle of reflection |
absorption | the transfer of energy carried by a light wave to particles of matter |
scattering | the release of light energy by particles of matter that have absorbed light |
refraction | the bending of a wave as it passes at an angle from one medium to another |
diffraction | the bending of a wave around a barrier or through an opening |
interference | interaction that occurs when two or more waves overlap |
transmission | the passing of light through matter |
transparent | light can easily be transmitted through |
translucent | light can be transmitted but is also scattered |
opaque | light can NOT be transmitted through |
pigment | a material that gives a substance its color by absorbing some colors of light and reflecting others |
light | produced by electrons aborbing and releasing energy when jumping to new positions and back, releases photons |
speed of light | 300,000,000 m/s |
radio waves | lowest frequency, longest wavelength |
AM | amplitude modulation, form of radio wave transmission, travels farther than FM, less information, picture |
FM | frequency modulation, form of radio wave transmission, does not travel as far as AM, more information, sound |
microwaves | shorter wavelength and higher frequency than radio waves, radar is a type |
radar | radio detection and ranging, used to detect speed and location of objects |
infrared | more energy than microwaves |
visible light | ROYGBIV, humans can see |
ultraviolet | helps produce vitamin D, can damage skin, causes wrinkles, cancer, and sunburn |
x rays | can penetrate skin to see inside the body, can damage healthy cells |
gamma rays | shortest wavelength, highest frequency, can treat cancer, can damage healthy cells |
light interacts with matter | reflected, absorbed, or transmitted |
primary colors of light | red, blue and green |
primary colors of pigment | yellow, cyan, and magenta |
speed of light | distance/time |