Flashcards
EM Spectrum and Properties
Flashcards do conjunto (42)
- 1What kind of waves are Electromagnetic Waves?Electromagnetic Waves are transverse waves made up of electric and magnetic fields
- 2What is the Amplitude?Amplitude is how high the wave is
- 3What is Wavelength?The wavelength is the distance between two corresponding points
- 4What is Frequency?Frequency is the amount of waves that pass by every second. t is measured in Hertz
- 5Finish of the following sentence: The shorter the wave length, the____its frequencyHigher
- 6Finish the following sentence: The shorter the wavelength, the ______its energy.Higher
- 7Fill in the gaps of the following sentence:# The_______its frequency, the _____its energyHigher and Higher
- 8What happens when waves hit a surface?When waves hit a surface, they are either reflected, transmitted or absorbed.
- 9What does the waves behavior depend on?The waves behavior depends on it's energy and type of material
- 10At what speed do all Electromagnetic Waves travel at?All electromagnetic waves travel at the same speed.
In a vacuum (space) they travel at 300,000,000 m/s - 11What is the EM Spectrum?The EM Spectrum is the continuous series in order of changing wavelength, frequency and energy
- 12In what order does the EM Spectrum go?uhi
- 13What are radio waves used in?Radio Waves are used in telecommunications, television,and Radio Broadcasting.
- 14How are radio waves produced?They are produced by the acceleration of electrons in a magnetic field or the oscillation of electrons by an electronic field
- 15What are Microwaves used in?Microwaves are used in communications, radar and microwave ovens.
(They are reflected by metals but absorbed by living tissues and other materials) - 16What are microwaves produced in?Microwaves are produced in machines such as magetrons
- 17What is infrared used in?Infrared is used in remote controls, photography, meteorology and astronomy.
(They are reflected by shiny surfaces and absorbed by other materials) - 18How are infrared waves produced?Infrared is produced by hot objects
- 19What is visible light used in?Visible light is used in sight and communications.
(It is reflected by shiny surfaces and absorbed by others) - 20How is visible light produced?Visible light is produced by very hot objects, electric discharge and some chemical reaction.
- 21What is Ultra Violet used in?Ultra violet is used in Lighting for Entertainment and Security, Sunbeds, Disinfection and Astronomy. It is absorbed by materials.
- 22How is Ultra Violet Produced?Ultra Violet is produced by stars, sparks, arc wielding and electric discharge
- 23How/ When are X-Ray used?X-rays are used in Medical Imaging, Crystallography and Airport Security.
- 24What is Gamma Rays used in?Gamma Rays is used in radiotherapy, disinfectant/ irradiation of food and medical equipment.
(It can pass through most materials but is absorbed by dense materials) - 25What is Gamma Rays produced by?It is caused by Radioactive decay
- 26What are the dangers of Microwave?They can cause minor heating
- 27What are the dangers of Infrared?Infrared can burn skin
- 28What are the dangers of Visible Light?Visible light can cause blindness
- 29What are the dangers of Ultra Violet?High doses of Ultra Violet can Kill Cells
Lower doses of Ultra Violet can cause cells to become cancerous - 30What are the dangers of X-Ray?High doses can kill cells
Lower doses can cause cells to become cancerous - 31What are the dangers of Gamma?High doses can kill cells
Lower doses can cause cells to become cancerous - 32What is absorption?The process in which EM Waves hit a surface and their energy is transferred to the material
- 33What is transmission?When a material allows waves to pass through it
- 34What is reflection?Reflection is when an EM Wave is bounced back from a surface
- 35What is the equation to find the frequency of a wave?Frequency= Wave Speed / Wave Length
- 36What is the equation to find the wavelength?Wavelength= Speed / Frequencu
- 37What is the equation to find the wave speed?Wave Speed= Frequency * Wavelength
- 38What is a transverse waves?Transverse waves are the particles moving up and down so the direction of their movement is at right angles to the wave direction
- 39What is a longitudinal wave with an example?A longitudinal wave is the particles moving or vibrating back and forth so their movement is parallel to the wave direction
- 40What is Frequency Measured in?Frequency is measured in Hertz (Hz)
- 41What is Wavelength measured inWavelength is measured in metres
- 42What is wave speed measured in?Wave speed is measured in metres per second (m/s)
Informações
- Descrição
- AQA Science (EM Spectrum) FlashCards sobre EM Spectrum and Properties, criado por Britney Bullen em 02-06-2016.
- Criado por
- Britney Bullen
- Visualizações
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- Avaliação