Edexcel P1 Topic 2.txt

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HLHSscience
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199156
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Edexcel P1 Topic 2.txt
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2013-02-09 13:04:31
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Edexcel Physics1 Topic2
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Edexcel Physics 1 Topic 2
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  1. Which electromagnetic waves travel the fastest, radio or gamma?
    All electromagnetic waves travel at the same speed (300 million metres per second)
  2. Are electromagnetic waves transverse or longitudinal?
    Transverse
  3. Gamma rays are at one end of the electromagnetic spectrum. Are they high or low frequency waves?
    • Gamma rays are high frequency.
    • This means that they carry lots of energy and can be dangerous.
  4. How do we know that electromagnetic waves can travel through space?
    We can see stars from Earth so the light must have travelled through space to us
  5. What did Herschel and Ritter do?
    Herschel discovered infrared just beyond the red end of the visible light spectrum.

    Ritter discovered ultraviolet, just beyond the violet end of the visible light spectrum.
  6. Name the 7 parts of the electromagnetic spectrum, in order, starting with the lowest frequency
    • radio
    • microwave
    • infrared
    • visible
    • ultraviolet
    • x-ray
    • gamma

    Remember : Rabbits Mate In Very Unusual eXpensive Gardens !
  7. Name the colours of the visible spectrum, in order, starting with the lowest frequency
    • red
    • orange
    • yellow
    • green
    • blue
    • indigo
    • violet

    Remember : Richard Of York Gave Battle In Vain
  8. As frequency increases across the electromagnetic spectrum, what happens to wavelength?
    It decreases.
  9. Which are the most dangerous electromagnetic waves, those with a high or low frequency?
    High frequency are the most dangerous (eg x-rays and gamma rays)
  10. Which type of electromagnetic radiation heats body cells from inside?
    microwaves
  11. Which type of electromagnetic radiation causes skin burns?
    infrared
  12. Which type of electromagnetic radiation causes damage to surface cells and eyes leading to skin cancer and eye conditions?
    ultraviolet
  13. Which type of electromagnetic radiation causes mutation or damage to cells in the body and can cause cancer?
    x-rays and gamma rays
  14. Which type of electromagnetic waves are used for broadcasting, communications and satellite transmissions?
    radio
  15. Which type of electromagnetic waves are used for cooking, communications and satellite transmissions?
    microwave
  16. Which type of electromagnetic waves are used for cooking, thermal imaging, optical fibres, TV remote controls and security systems?
    infrared
  17. Which type of electromagnetic waves are used for vision, photography and illumination?
    Visible light
  18. Which type of electromagnetic waves are used for security marking, fluorescent lamps, detecting forged bank notes and disinfecting water?
    Ultraviolet
  19. Which type of electromagnetic waves are used for looking at the internal structure of objects, airport security scanning and detecting breaks in bones?
    x-rays
  20. Which type of electromagnetic waves are used for sterilising food and medical equipment, detecting and treating cancers?
    Gamma rays
  21. Radioactive sources emit ionising radiation. How can you control when they emit it?
    • You cannot control it.
    • They give off radiation all the time. The amount will depend upon the activity of the source.
  22. Name 3 types of ionising radiation
    • alpha particles
    • beta particles
    • gamma rays
  23. How can you protect yourself from damaging UV radiation from the sun?
    • Wear protective sun cream
    • cover up
    • reduce exposure by staying inside during the middle of the day
  24. What is a cell mutation?
    It is a change in the cell’s DNA that could kill the cell or cause cancer
  25. Gamma rays can be used to kill cancer cells in a patient. What is this type of treatment called?
    radiotherapy
  26. Infrared signals can be transmitted at high speed along special fibres for fast communications. What are these fibres called?
    Optical fibres
  27. What does ionising radiation do?
    It removes electrons from atoms to form ions. Ions are reactive and can damage DNA
  28. What type of radiation is this the symbol for ?
    Alpha radiation
  29. What type of radiation is this the symbol for ?
    Beta radiation
  30. What type of radiation is this the symbol for ?
    gamma radiation

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