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16 Cards in this Set
- Front
- Back
What is the electromagnetic spectrum? |
The electromagnetic spectrum consists of a family of waves which travel energy . |
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What speed does the waves of the electromagnetic spectrum travel at? |
They all travel at the speed of light in a vacuum- 3.0×10^8ms-¹ |
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What types of waves are in the electromagnetic spectrum? |
All the waves are transverse and are able to travel through a vacuum. |
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The shorter the wavelength… |
The shorter through wavelength the higher frequency the wave has |
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The longer the wavelength… |
The longer the wavelength the lower frequency the wave has. |
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What is the order of the waves in the electromagnetic spectrum from low frequency to High frequency |
Radio waves, television waves, microwaves, infrared, visible light, ultraviolet, x-rays, gamma rays |
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Which waves of the electromagnetic spectrum has the highest frequency? |
Gamma rays has the highest frequency therefore carries the most energy. |
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List few points about radio and television waves |
•they are all around us •has the longest wavelength on the electromagnetic spectrum •Produces sound or visual images |
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List few points about microwaves |
•shorter wavelength than radio and television waves •used in telecommunications and mobile phones •used in microwave ovens when they cause water molecules in food to vibrate and generate heat. |
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List few points about Infrared waves |
•any object hotter than its surrounding will have infrared radiation •detected with special cameras-infrared film/thermographic cameras •treat muscle injury •help diagnose diseases |
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List few points about Visible light |
•detected by our eyes/color we see Depending upon the frequency/wavelength of the light |
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List few points about ultraviolet |
•comes from the Sun •Cab be produced by special lamp •cause skin to tan •dangerous as it can cause skin damage-skin cancer •cause certain materials to fluoresce or glow |
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Make a few points about X-rays |
•has the ability to pass through the human body •detected by photographic film •bones appears pale in a X-ray •metals appear white in an X-ray |
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Make a few points about Gamma rays |
•most dangerous of the electromagnetic spectrum •can be put to used in medicine •used to destroy tumors inside a paitent's body |
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What is the energy of a photon of electromagnetic radiation dependent upon? |
The energy of a photon of electromagnetic radiation is dependent upon the frequency of the radiation. The higher the frequency, the greater the energy of the photon |
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Explain approached that are taken to miniseries the risks of ultra violet |
Wearing UV blocking sunscreen on sunny days can avoid skin cancer. We should wear hats and sunglasses to avoid blindness. |