Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Science Test 22&23
chapter 22 sections 1,2,3,& 4 and hapter 23, section 1
| Question | Answer |
|---|---|
| how does light travel? | in waves |
| Does light require matter to travel? | NO |
| what is a wave that can travel through empty space or matter and consists of changing electric and magnetic fields? | Electromagnetic wave |
| what kind of field surrounds ever object, pulls oppositely charged objects in, and repels like charged objects? | electric |
| what field surrounds every magnet? | magnetic |
| how are EM waves formed? | 1.the vibration of an electricly charged particle 2.then Electirc field vibrates 3.then magnetic field vibrates 4.energy carried, and released by original vibration of particle |
| what is the transfer of energy in EM waves? | radiation |
| True or false.... there is such a thing that traels faster than light. | false... nothing travels faster than light |
| what is the speed of light? | 300,000 km/s or 300,000,000 m/s |
| what does light travel through fastest? air, glass, or a vacuum | vacuum |
| what is the major source of light? | the sun |
| does all the suns light reach earth? if no, what happens to it? | no, it goes off into space |
| what is light called if you can see it? | visible light |
| can you see all light? | no, but both types of EM waves |
| whst is the entire range of EM waves called? | EM spectrum |
| how is it divided? | into regions according to length |
| what does it mean when a wave has a larger wavelength? | smaller frequency |
| what kind of waves have some of the largest wavelengths? | radio waves |
| what is the changing of amplitude or frequency? | modulation |
| AM? | amplitude modulation |
| FM? | frequency modulation |
| which have longer wavelengths and travel longer distances? | AM |
| which are less affected by elcectrical noise? | FM |
| what kind of signal are also carried by radio waves? | tv |
| what kind of wave have slightly shorter wavelengths and higher frequencies than radio waves and are used to send info long distances? | microwaves |
| what is RADAR and what is it used for? | radio detection and ranging, and used to detect speed and location of object |
| what waves have shorter wavelengths and highr frequencies that microwaves? | infrared |
| do all things give off infrared waves and does it depend on temp.? | YESS, warmer objects=more infrared rays |
| what is a very narrow range of wavelengths and frequencies in EM spectrum that humans can see ? | visible light |
| What is the visble light from the sun, and is all visible light wavelengths combined? | white light |
| True or false.. humans see different wavelengths of VL as different colors? | TRUE |
| longest wavelength is...? shortest...? | longest.. red. shortest.... violet |
| what is the range of colos called? | visible spectrum |
| what is another type of EM waves produces by the sun with shorter wavelengths, and higher frequencies than VL? | ultraviolet light |
| what can too much UV light cause? | sunburn, skin cancer, wrinkles, and damage to the eyes |
| what are rays that can pass through many materials, are helpful in medical field, and too much exposure can damage or kill living cells? | X rays |
| what are waves that can penatrate throug most materials easliy, are used to treat some forms of cancer, but also kiss healthy cells? | gamma rays |
| what happens all around us, and it is when light waves boounce off an object? | reflection |
| What states that the angle of incidence is equal to the angle of refelction? | the law of refelction |
| arrival of beam of light at surface | incidence |
| what is it called that because a mirror's surface is very smooth, that the light beams reflect off al points of mirror at same angle? | regular reflection |
| what us it called when beacuse a walls surface is rough, light beams hit the wall's surface and reflect in many different angles? | diffuse reflection |
| objects that produce light? | luminous |
| visible object that isnt a light source? | illuminated |
| transfer of energy carried by light waves ato particles of matter | absorbtion |
| an interacion of light with matter that causes light to change direction | scattering |
| thebending of a wave as it apsses at an angle from one substance or material to another, that occurs becuase the speed of light varies depending on material through which the waves are passing? | refraction |
| T or F.. whan a wave enters a new material at an angle, part of wave enter 1st begins traveling at different speed from rest of wave | TRUE |
| your brain always interprets light as what kind of line? | straight |
| what is the bending of waves around barriers or through openings? | diffraction |
| what does the amount of wave diffracted depend on? | wavelngth and size of barrier or opening |
| when does greatest amount of diffraction occur? | when barrier or opening is sam size or smaller than wavelength |
| what is a wave interaction that happens when 2 or more waves overlap? | interferance |
| when is the resulting wave greater in amplitude than original? | in a constructive interferance |
| when does the resulting wave have smaller amplitude than individual wave? | deconstructive interferance |
| when light strikes any form of matter, it can interact with matter in 3 ways : | reflection, absorbtion, and transmission |
| passing of light through matter? | transmission |
| matter through which visible light is easy ot see | transparent |
| matter transmits light but also scatters light as it passes through matter | translucent |
| matter that doesnt tramsmit any light | opaque |
| humans see different wavelengths of light as different what? | colors |
| the color and object appears to be determined by wavelengths aof light that reach your what? | eyes |
| light reaches your eyes after being reflected off any object or after being what through an object? | transmitted |
| what happens when white light strikes a colored opaque object | some colors of light are absorbed and some are reflected, then only the light that is reflected reaches your eyes and is detected. so colors of light that are reflected by opaque object determine color you see |
| T or F.. some transparent objects can be colored | T |
| how do you form white light? | adding grren, red, and blue together |
| Red, blue and green are what? | primary colors of light |
| color addition | combining colors |
| 2 colors added together | secondary colors |
| secondary colors: | cyan, magenta, yellow |
| material that gives a substance color by absorbing some colors of light and reflecting others | pigment |
| when you mis pigments together, more colors are absorbed, or taken away | color subtraction |
| primary pigments: | magenta, cyan, yellow |
| magent-cyan-yellow=? | black |
| because light travels in straight lines, you can use a what to show path and direction of wave after it reflects or bends | ray |
| mirror that has a flat surface with images reversed, adn produces virtual image | plane mirror |
| image trhough which light doent travel | virtual image |
| concave mirror | mirror curved inward |
| real image | image through which light passes |
| convex mirror | mirror that curves outward, produces images that are virtual, right side up, and smaller than original |
| tranparent object that froms image by refracting | lens |
| 2 types of lenses | convex and concave |
| convex lens | thincker in middle and thin on edges |
| concave lens | thinner in middle thicker on edges |
Created by:
200226026
Popular Physical Science sets