5639692
Description
Flashcards by Britney Bullen, updated more than 1 year ago
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Created by Britney Bullen
almost 8 years ago
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| Question | Answer |
| What kind of waves are Electromagnetic Waves? | Electromagnetic Waves are transverse waves made up of electric and magnetic fields |
| What is the Amplitude? | Amplitude is how high the wave is |
| What is Wavelength? | The wavelength is the distance between two corresponding points |
| What is Frequency? | Frequency is the amount of waves that pass by every second. t is measured in Hertz |
| Finish of the following sentence: The shorter the wave length, the____its frequency | Higher |
| Finish the following sentence: The shorter the wavelength, the ______its energy. | Higher |
| Fill in the gaps of the following sentence:# The_______its frequency, the _____its energy | Higher and Higher |
| What happens when waves hit a surface? | When waves hit a surface, they are either reflected, transmitted or absorbed. |
| What does the waves behavior depend on? | The waves behavior depends on it's energy and type of material |
| At 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 |
| What is the EM Spectrum? | The EM Spectrum is the continuous series in order of changing wavelength, frequency and energy |
| In what order does the EM Spectrum go? | uhi |
| What are radio waves used in? | Radio Waves are used in telecommunications, television,and Radio Broadcasting. |
| How 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 |
| What 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) |
| What are microwaves produced in? | Microwaves are produced in machines such as magetrons |
| What 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) |
| How are infrared waves produced? | Infrared is produced by hot objects |
| What is visible light used in? | Visible light is used in sight and communications. (It is reflected by shiny surfaces and absorbed by others) |
| How is visible light produced? | Visible light is produced by very hot objects, electric discharge and some chemical reaction. |
| What is Ultra Violet used in? | Ultra violet is used in Lighting for Entertainment and Security, Sunbeds, Disinfection and Astronomy. It is absorbed by materials. |
| How is Ultra Violet Produced? | Ultra Violet is produced by stars, sparks, arc wielding and electric discharge |
| How/ When are X-Ray used? | X-rays are used in Medical Imaging, Crystallography and Airport Security. |
| What 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) |
| What is Gamma Rays produced by? | It is caused by Radioactive decay |
| What are the dangers of Microwave? | They can cause minor heating |
| What are the dangers of Infrared? | Infrared can burn skin |
| What are the dangers of Visible Light? | Visible light can cause blindness |
| What 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 |
| What are the dangers of X-Ray? | High doses can kill cells Lower doses can cause cells to become cancerous |
| What are the dangers of Gamma? | High doses can kill cells Lower doses can cause cells to become cancerous |
| What is absorption? | The process in which EM Waves hit a surface and their energy is transferred to the material |
| What is transmission? | When a material allows waves to pass through it |
| What is reflection? | Reflection is when an EM Wave is bounced back from a surface |
| What is the equation to find the frequency of a wave? | Frequency= Wave Speed / Wave Length |
| What is the equation to find the wavelength? | Wavelength= Speed / Frequencu |
| What is the equation to find the wave speed? | Wave Speed= Frequency * Wavelength |
| What 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 |
| What 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 |
| What is Frequency Measured in? | Frequency is measured in Hertz (Hz) |
| What is Wavelength measured in | Wavelength is measured in metres |
| What is wave speed measured in? | Wave speed is measured in metres per second (m/s) |
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