Waves
- Created by: Tom Bowen
- Created on: 26-05-14 15:29
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- WAVES
- Amplitude, wavelength, frequency, periods.
- Amplitude
- height of wave from middle line to peak.
- Wavelength
- covers full cycle of a wave
- Frequency
- how many complete waves per second
- measure in HERZ (H)
- Peroids
- time taken to complete one wave
- Amplitude
- Equatons
- Speed=distance over time
- speed=frequency x wavelength
- The Electromagnetic Spectrum
- 7 wave types, travel speed of light .
- 1. RADIO WAVES (LONGEST WL,LOWest F)
- communication
- 2. MICROWAVES
- Cooking
- Communication
- 3. INFRA-RED
- Heating
- Burn skin
- Remote control
- 4. VISIBLE LIGHT
- eyes detect
- burn eyes
- 5. ULTRA-VIOLET
- tans
- skin cancer
- 6. X-RAYS
- broken bones
- cancer
- 8. GAMMA RAYS (SHORTEST WL, HIGH F)
- nuclear
- cancer
- keep food fresh
- 1. RADIO WAVES (LONGEST WL,LOWest F)
- 7 wave types, travel speed of light .
- Green houses effect
- CO2 + Methane
- temp balance between heat-sun and heat -space
- atmosphere-insulating, keep planet warm
- keeps getting hotter and hotter
- greenhouse gases rising=global warming
- floods/droughts
- changes in patterns
- melt ice caps=flods
- increasing
- co2 balanced. released-respiration
- massive amounts of fossil fuels
- deforestation
- gone up-20%= over heating planet
- CO2 + Methane
- Reflection, Refraction
- REFLECTION
- reflects light to allow us to see
- REFLECTION
- uneven surface- relfecs different angle
- REFRACTION
- waves change speed as they move
- change in speed=change in direction
- wavelength changes
- REFLECTION
- Communication
- TELECOMMUNICATIONS
- Microwaves, satellite links
- OPTICAL FIBRE
- internal reflection
- faster
- little energy lost
- little environmental damage
- Very expensive
- very secure
- Precisely Installed
- TELECOMMUNICATIONS
- Health Risks
- high power transmitters=dangerous to nearby resisidents
- Evidence-anecdotal
- Dizziness
- cancer
- nausea
- Evidence-anecdotal
- high power transmitters=dangerous to nearby resisidents
- Amplitude, wavelength, frequency, periods.
- Vibrations,
- Most waves are Transverse
- light waves
- direction of disturbance creating the wave is at a right angles to the wave travel.
- e.g ripples on water, waves on string
- Longitudinal
- the direction of disturbance creating wave is in same direction
- e.g sound waves, shock waves
- Most waves are Transverse
- DISADVANTAGES
- ADVANTAGES
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