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PS CH12/13/14 Review
DHS PS CH 12/13/14 Review
| Question | Answer |
|---|---|
| What is made by vibrating electric charges and can travel thorugh space? | electromagnetic waves |
| Related forces that operate even in empty space are? | electric and magnetic fields |
| What creates a magentic field? | a moving electric charge |
| What fields create changing electric fields? | changing magnecic fields |
| What is produced whan en electric charge is vibrating? | electromagnetic waves |
| Vibrating electric charges are __________ by vibrating electric and magnetic fields. | surrounded |
| Vibrating electric and magnetic fiels travel which wayh from the moving charge? | outward |
| These carry radiant energy? | electromagnetic waves |
| As frequency increases in electromagnetic waves, what does the wavelength do? | decreases |
| The number of vibrations per second is called? | frequency |
| Frequency is measured in? | hertz |
| The distance from one crest to another is called? | wavelength |
| Wavelength is measured in? | meters |
| The entire range of electromagnetic wave frequencies is called the? | electromagnetic spectrum |
| Low frequency electromagnetic waves with wavelengths from less than a centimeter to about 1000 meters is called? | radio waves |
| Radio wave lengths of about 1 to 20 cm are called? | microwaves |
| When radio waves bounce off an object to determine its speed and location is called? | radar |
| When radio waves produce an image of the inside of the body it is called? | Magnetic Resonance Imaging (MRI) |
| Electromagnetic wave with a slightly higher frequency than radio waves are called? | infrared waves |
| What type of waves do people feel as thermal energy or warmth? | infrared waves |
| What has wavelengths between about 390 to 770 billionth of a meter? | visible light |
| What has frequencies slightly higher than visible light? | ultraviolet waves |
| What type of waves can damage skin? | ultraviolet waves |
| What can kill bacteria? | ultraviolet light |
| This can be absorbed by some fluorescent materials and released as visible light? | ultraviolet light |
| What is located above the Earth's surface and absorbs most of the Sun's harmful ultraviolet waves? | ozone layer |
| What are ultra-high frequency electromagnetic waves that can travel through matter, break molecular bonds, and damage cells? | xrays and gamma rays |
| What are used to rpovide images of bones and to examine suitcases at airports without opening them? | x rays |
| What is used to kill diseased cells? | radiation therapy |
| The speed of electromagnetic waves is? | 300,000 km/s in a vacuum |
| Oscillating electrons generate what type of changing fields? | electric and magnetic |
| What type of waves are electromagneitc waves? | transverse waves |
| What is the particle that carries radiant energy? | photon |
| The _______ of light determines whether a radiation will eject electrons. | frequency |
| When electrons are fired at two closely-spaced openings form a wave-like interference pattern. This proves that electromagnetic waves act as? | waves |
| Electromagnetic waves are made by? | vibrating electric charges |
| Electric current passing through a wire produces? | a magnetic field around the wire |
| The energy carried by an elecgromagnetic wave is called? | radiant energy |
| In 1887, Heinrich Hertz found that by shining light ona metal, electrons were ejected from the metal. This proves that electromagnetic waves act as? | particles |
| Electromagnetic radiation with the shortest wavelength is? | gamma rays |
| The electromagnetic waves with wavelengths slightly longer than visible light are? | infrared waves |
| The frequency of purple light is ____ than that of yellow light. | higher |
| These are used for medical imaging. | X rays |
| What your body needs to make vitamin D? | ultraviolet waves |
| Gamma rays are dangerous because they? | break down molecules and cells |
| What type of device does NOT utilize radio waves? | television remote control |
| What type of electromagnetic waves can break molecular bonds? | gamma rays |
| As you m ove from left to right on the Electromagnetic Spectrum, the frequency? | increases |
| Which electromagnetic wave would carry the greatest energy? | gamma rays |
| The ozone layer protects us from too much? | ultraviolet radiation |
| Energy carried by electromagnetic waves is called? | radiant energy |
| These waves are waves with wavelengths shorter than visible light and are used to kill bacteria? | ultraviolet waves |
| The highest energy electromagnetic rations is? | gamma rays |
| Waves produced by an oscillating electric charge are? | electromagnetic waves |
| Electromagnetic waves with the longest wavelengths are called? | radio waves |
| As the wavelength of an electromagnetic wave decreases, its frequency? | increases |
| Waves with wavelengths between radio and visible light are? | infrared waves |
| The number of waves that pass a certain point in a second is called? | frequency |
| Particles of radiant energy? | photons |
| Electromagnetic frequencies to which our eyes are sensitive? | visible light |
| Short radio waves? | microwaves |
| The unit of radiant energy is the? | photon |
| As the frequency of an electromagnetic wave decreases, its energy? | decreases |
| Electromagnetic waves carry? | energy |
| To track a hurricane, meteorologists use? | radar |
| When gamma rays pass through living tissue, the damage? | molecules |
| Each color of visible light has a different? | wavelength |
| The speed of electromagnetic waves is? | 300,000 km/s in a vacuum |
| The ________ of light determines whether a radiation will eject electrons. | frequency |
| Electromagnetic radiation with the shortest wavelength is? | gamma rays |
| The electromagnetic waves with wavelengths slightly longer than visible light are? | inrared waves |
| These are used for medical imaging? | X rays |
| Televisions use what to transmit signals? | radio waves |
| An electromagnetic wave is able to produce both an electric field and a magnetic field becasue? | the fields continually recreate each other |
| How do electromagnetic waves communicate information? | amplitude modulations |
| You heated some leftovers in a microwave. You notices that the food got hot but not the inside of the microwave. This happens because? | microwaves heat by interacting with water molecules |
| To scan a person's internal organs a doctor would use? | Magnetic Resonance Imager |
| Photons are also like waves in that they? | carry energy |
| You can vibrate the electric fields of water molecules using? | microwaves |
| What is the name of the ability of some materials to absorb ultraviolet light and reemit it as visible light? | fluorescene |
| The warmth you feel when you stand in front of a fire is thermal energy transmitted to you by what type of electromagnetic waves? | infrared waves |
| Who explained how light can behave as a particle whose energy depends on the frequency of light? | Einstein |
| What type of electromagnetic waves will pass through clouds but not glass? | |
| In order for objects to be seen the must? | reflect light |
| This type of material does not allow light to pass through them. | opaque |
| This type of material only absorb and refelct light. | opaque |
| This type of material allows some light to pass through. | translucent |
| This type of material allows almost all light to pass through them. | transparent |
| In this type of material only alittle light is absorbed and reflected. | transparent |
| When a light wave strikes an object and bounces off it is called? | reflection of light |
| The angle at which light strikes a surface is the same as the angle at wich it is reflected ic called? | Law of reflection |
| Reflection of light waves from a smooth surface is called? | regular reflection |
| Relfection of light waves from a rough surface is called? | diffuse reflection |
| The change in the speed of a light wave when it passes from one material to another is called? | refraction of light |
| What indicates how much a material reduces the speed of light? | index of refraction |
| In the index of refraction, the more lights is slowed, the ___________ the index of refraction. | greater |
| What separates white light into visible spectrum based on light wavelengths? | prisms |
| What is caused by water droplets refracting wavelengths of sunlight? | rainbows |
| Refraction of light through air layers of different densities can result in a? | mirage |
| Why can't you see an object in the dark? | Objects must reflect light to be seen |
| What is determined by wavelength of light an object reflects? | colors |
| Objects appear to be white because they? | reflect all colors of visible light |
| Objects appear to be black because they? | absorb rather than reflect all colors of visible light |
| What type of transparent material absorbs all colors except the color or colors it transmits? | filter |
| What can make objects appear to be different colors? | filters |
| What is made up of two types of cells that absorb light? | retina |
| What distinguishes colors and detailed shapes; most effective in datytime vision? | cones |
| What is sensitive to dim light; most effective in nighttime vision? | rods |
| What results when one or more sets of cones do not function properly?" | color blindness |
| What is the colored material that absorbs some colors and reflects others? | pigment |
| Red, green and blue are called? | primary colors of light |
| Magenta, cyan, and yellow are called? | primary colors of pigment |
| When primary colors of light combine to form white they are called? | additive colors |
| When primary colors of pigment combine to form black, they are called? | subtractive colors |
| What would happen if none of the cones in a person's eye did dor work properly? | the person would not see color |
| This type of material only absorbs and reflects light? | opaque |
| Which type of material transmits almost all of the light that strikes it? | transparent |
| The angle at which light strikes a surface is _________ the angle at which it is relfected. | the same as |
| Why can't you see your reflection in a brick wall? | light rays are reflected in many directions from the uneven surface |
| Reflection of light waves from a smooth, mirror like surface is called? | regular reflection |
| What property of a material indictes how much light slows down when traveling in it? | index of refraction |
| If the handle of your aquarium net appears to be bent more when it is placed into a glass aquarium full of water than it does when the tank is empty, the index of refraction os water is? | greater than the index of refraction of air |
| A glass prism ________ light, producing the individual colors of visible light. | refracts |
| Light rays that pass through a lens change direction because? | they are refracted |
| What determines the color of an object? | the wavelength of light it reflects |
| If a transparent blue filter is placed over a camera lens, what happens to visible light entering it? | blue light is transmitted by the filter to the camera, and other colors of light are absorbed by the filter |
| The part of the eye where light is focused is called the? | retina |
| What type of cells are located in the retina? | cone |
| What type of cell is the most useful at night? | rods |
| A colored material that absorbs some colors and reflects other is called? | pigment |
| Which cone cells absorb yellow light? | red and green |
| The three primary colors of pigment when mixed appear? | black |
| What percentage of males are color blind? | 8%` |
| What is the most common type of color blindness? | red and green |
| What is required for your eye to see an object? | light coming from the object |
| What type of mirror is a flat, smooth mirror? | plane |
| What does your brain perceive even though no light rays pass trhough it? | virtual image |
| What is an imaginary straight line perpendicular to the cener of a concave mirror? | optical axis |
| What type of mirror is curved inward? | concave |
| The distance from the center of the mirror to the focal point is called the? | focal length |
| What type of mirror is curved outward? | convex |
| A real image can be described as? | rays of light meeting at the image |
| Any smooth surface that reflects light to form an image is called a? | mirror |
| When an object is farther from a concave mirror than the focal point is, the image that is formed is? | inverted and smaller than the object |
| What is the condition that occurs when the cornea is curved unevenly? | astigmatism |
| The transparent covering on the human eyeball is called the? | cornea |
| What type of image is formed on the retina? | inverted |
| What kind of lens is helpful to nearsighted people? | concave |
| What is the differrence between a lens and a mirror? | mirros reflect light, and light passes through lenses |
| What type convex lens forms a virtual image? | object within one focal point |
| What is the inner lining of your eye that has cells for converting light into electrical signals called? | retina |
| What type of lens is thinner in the middle and thicker at the edges? | concave |
| What type of lens is thicker in the middle than at the edges? | convex |
| What structure carries electrical signals from the retina to the brain to be interpreted? | optic nerve |
Created by:
basmith
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