Flashcards
Waves and the Electromagnetic spectrum
Flashcards do conjunto (37)
- 1What is the order of the electromagnetic spectrum from high frequency and low wavelength to low frequency to high wavelength?*Gamma
*X-ray
*Ultraviolet
*Visible light
*Infra red
*Microwave
*Radiowave - 2What is the mnemonic used to remember the electromagnetic spectrum?*Granny's
*X-box
*Uses
*Volts
*In
*My
*Room - 3What is a longitudinal wave?A wave which the direction of the vibrations of the particles are the para..llel to the direction of which the waves travel.
- 4What is a transverse wave?Waves in which the directions of the vibration is perpendicular to the direction of which the wave is traveling.
- 5What is the wavelength the distance between?*It is the distance from one wave peak to another.
- 6What is the frequency of a wave and what is it measured in?The number of complete waves passing a fixed point per second.
- 7What does a wave look like if it's compressed?The wave will be in straight lines close together.
- 8What does a wave look like if it has a rarefaction?The waves will be more spread apart.
- 9What is a radiowave used for?*Communication
- 10What is a microwave used for?*Satellite communication and cooking
- 11What is Infra-red used for?*Remote controls
*Thermal cameras - 12What is Visible light used as?*Seeing
*Optical fiber communication - 13What is ultraviolet light used for?*Florescent tubes
*Security markings. - 14What is an X-ray used for?*Creating images of the inside of the body.
- 15What are gamma rays used for?*Sterilizing medical equipment
*Treating tumors - 16All the members of the E-M spectrum are what type of waves?*Transverse waves
- 17What is the law of refraction?The angle of incidence=the same as the angle of reflection
- 18When a light ray travels from air to glass which way does it reflect?Away from the normal.
- 19When light travels from glass into the air what happens?It refracts towards the normal.
- 20Name some properties of waves that make it useful for satellite communication?They can pass through the atmosphere.
- 21The higher the ...... the further the waves travel?Frequency
- 22What can visible light and microwaves both do?*Be reflected
*Travel through a vacuum at the same speed. - 23What do high frequency waves look like?Tall and have a high pitch.
- 24The bell in a jar experiment shows what?That sound vibrations cannot travel through a vacuum
- 25What are reflected images?*Virtual
*Upright
*Laterally inverted - 26m/s = hertz (HZ) x meters?Wave speed = Frequency x Waveleghth
- 27Definition refraction?The change in direction of a wave when it moves from one substance to another e.g from air to glass.
- 28When light moves from a less dense substance to a more dense substance what happens?The light speeds up.
- 29Definition diffraction?This is the spreading out of waves, and how they pass through a gap.
- 30What happens when something diffracts through a wide gap?The wave stays the same still fairly spread out
- 31What happens with diffraction through a narrow gap? (Think of wide pipes and thin ones)There's more diffraction because it will start with smaller waves and then the wave will spread out more again. Like a radiowave
- 32What happens with diffraction around an obstacle?Th wave splits in half and reduces in size and it will meet up again after passing through the object.
- 33Why are the Tv and radio transitions different?The Tv is diffracted less, where as the radio is longer and diffracted more.
- 34What do waves transfer from place to place?Energy!
- 35What is the equation for speed?Speed=distance x time
- 36You always need to convert to Hertz!20KHz is the same as 2000Hz
MHz-Hz you add 6 zeros'
KHz-Hz you add two zeros - 37The colors of the rainbow!Richard Of York Gave Battle In Vain.
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- FlashCards sobre Waves and the Electromagnetic spectrum, criado por Zara Kanani em 05-11-2014.
- Criado por
- Zara Kanani
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