Level 181 Level 183
84 words 0 ignored
Ready to learn Ready to review
Check the boxes below to ignore/unignore words, then click save at the bottom. Ignored words will never appear in any learning session.
a group of different types of waves (radio waves, microwaves, infrared waves, visible light, ultraviolet light, x-rays, gamma rays)
electromagnetic waves with the longest wavelength and lowest frequencies
a system that uses reflected waves to detect objects and measure their distance and speed
electromagnetic waves that can cause water molecules inside food to vibrate, heating the food.
electromagnetic waves that have wavelengths slightly longer than wavelengths of red visible light
higher energy and shorter wavelengths than visible light; makes up 9% of energy emitted by the sun They are the reason we wear sunscreen.
electromagnetic waves used to make images of bones and teeth
electromagnetic waves with the shortest wavelength and the highest frequencies
Skin cells produce this when exposed to ultraviolet light.
(physics) the capacity of a physical system to do work
wavelength and frequency
Electromagnetic waves are classified in a spectrum according to these two properties of waves.
Electromagnetic waves are
A device that uses ultraviolet (UV) light.
A device that uses microwaves.
electromagnetic waves that can be seen with the unaided eye
night vision goggles
A device which uses infrared (IR) waves to allow you to see at night
Refraction is caused by changes in the speed of _______ as it passes from one material to another.
particles and waves
light has properties of both _______ and _______
light as a wave
Fluctuating electric and magnetic field
186,000 miles per second
speed of light particle as it radiates from its source in a wave pattern
the part of the electromagnetic spectrum that can be seen. visible ligth makes up only 35 percent of natural sunlight
the sun; incandescence; electrical discharge; fluorescence; luminescence
A process that makes light with heat
process of producing light by passing an electrical charge through a gas e.g. sodium lamps
the emission of light from a substance that has absorbed light energy
substances that emit visible light when struck by radiation e.g. cathode ray tubes on a t.v.
the warmth or coolness of a color. eg blue is cool and orange is warm
The art of measuring the intensity of light.
All light passes through; can see through clearly eg. glass
a type of material that scatters light as it passes through it
impossible to see through; preventing the passage of light
transmission of light
When a light wave passes through an object however Some alteration of the light wave does take place, e.g. change direction, slowing down, refracted
a wave is bent due to a change in speed
reflection of light in all directions
(physics) the process in which incident radiated energy is retained without reflection or transmission on passing through a medium
Cells inside the retina
psychological/emotional, physiological, and environmental
e.g red is regarded as a hot color and is seen to provoke anger or aggression, black is associated with death, dignity, white with purity, and green with fertility
color blindness due to some deficiency in color sensitive pigments in the cones of your eyes
Pure or fundamental colors (red, yellow, and blue) that cannot be created by combining other colors.
Colors obtained by mixing equal parts of two primary colors, Green, Orange, Violet
additive primary colors
Red, blue, and green light. These colors when added together produce white light.
subtractive primary colors
The colors of magenta, yellow, and cyan- that, when mixed in certain proportions, reflect any other color in the visible-light part of the electromagnetic spectrum
it is the radiation that heat gives off
function in color vision and visual acuity
work best in dim light and enable you to see black, white, and shades of gray
photons kick an electron to an outer valence, if its not picked off, it falls back releasing a photon of energy (always red)
Waves that do not require a medium, but can travel through a medium (light from the sun is a type of electromagnetic)
The transfer of energy through matter or space as electromagnetic waves, such as visible light and infrared waves
Speed of light🎀
186,000 miles per second, or about 671 million miles per hour
The entire range of electromagnetic waves
A region around an object that can exert a force, a push or pull on another object
a transverse wave that involves the transfer of electric and magnetic energy
A radio receives radio waves and then converts them into an electric current, which is then converted into sound
Changing amplitude or frequency of radio waves; AM for amplitude modulation or FM for frequency modulation
Am Radio waves can reflect of the ionosphere. This helps AM waves travel long distances
FM radio waves pass through the ionosphere. Therefore, FM waves cannot travel as far as AM waves.
Have shorter wavelengths and higher frequencies than radio waves; carry more energy than radio waves
Microwaves are used in radar; used to detect the speed and location of objects; short pulses of microwaves are emitted and Boyce off the car and return to the source.
Infrared have shorter wavelengths and higher frequencies than microwaves; warm objects give off infrared radiation.
The very narrow range of wavelengths and frequencies in the electromagnetic spectrum that humans can see
The range of colors that you can see in a rainbow.
Has shorter wavelengths and higher frequencies than visible light; overexposure can cause skin damage.
Have some of the shortest wavelengths and highest frequencies of all EM waves; carry a great deal of energy and penetrate a variety of materials which is very useful in the medical field
Have some of the shortest wavelengths and highest frequencies of all EM waves; carry large amounts of energy which make them useful as artist ion treatments for cancer.
Occurs when light or any other wave bounces off an object.
Law of reflection🎀
States that the angle of incidence is equal to the angle of reflection.
The beam of light traveling toward the reflecting surface.
Reflection off a very smooth surface when all reflected beams are at the same angle
Reflection off a rough surface and the reflected beams are of many different angles
The transfer of energy carried by light waves to particles of matter
The release of light energy by particles of matter that have absorbed energy; light with shorter wavelengths, such as blue, scatter the most (is what makes the sky blue)
The bending of waves around a barrier or through an opening
A wave interaction that occurs when two or more waves overlap.
When waves combine and the resulting wave has a greater amplitude the individual waves had
When waves combine and the resulting wave has a smaller amplitude than the individual waves had; results in dinner light
the passing of light through matter; includes transparent translucent, but not opaque
Matter through which visibleivht is easily transmitted; includes air, clear glass, and water
Matter transmits light but also scatters the light as it passes through the matter; includes wax paper and frosted glass
Matter that does not transmit any light
A material that gives a substance it's color by absorbing some colors of light and reflecting others
Primary colors of light🎀
Red, blue, and green are the _?_ colors of light
Secondary colors of light🎀
When two primary colors are added together, a _?_ color is produced; include yellow, magenta, and cyan
All radio and television stations broadcast radio waves; have some of the longest wavelengths and lowest frequencies of all EM waves