The Electromagnetic Spectrum Group 2-10B by Heather Murray https://padlet.com/hglenville/5vqk1yt7afkd6x57 Make a post that explains the characteristics (wavelength/frequency/source) of your part of the EM spectrum. Explain two different applications of your wave and discuss pros and cons associated with your section. Include photos and links to any relevant and interesting sources. en-us 2021-04-28 10:12:10 UTC 2023-05-30 18:52:58 UTC hello@padlet.com Visible Light https://padlet.com/hglenville/5vqk1yt7afkd6x57/wish/2609472933 Visible light is a part of the electromagnetic spectrum that is perceived by the human eye. It ranges from approximately 400 to 700 nanometer in wavelength, corresponding to frequencies between 400 and 800 terahertz. Visible light is emitted by various sources, including the Sun, stars, and artificial light sources such as light bulbs and LEDs

Applications: Imaging and visualization, Visible light is extensively used in various imaging technologies, including photography, video cameras, and optical microscopes

Pro- different colors, allowing for the capture of images in full color, providing rich and detailed visual information.

Cons- Visible light cannot penetrate through opaque objects or tissues, which limits its application in certain imaging scenarios, such as deep-tissue imaging. ]]> 2023-05-30 18:26:37 UTC https://padlet.com/hglenville/5vqk1yt7afkd6x57/wish/2609472933 Gamma Rays https://padlet.com/hglenville/5vqk1yt7afkd6x57/wish/2609473045 Gamma rays have wavelengths shorter than 10^-11 meters and frequencies above 30 x 10^18 hertz
Applications : Sterilization and Disinfection
                        Radiotherapy - killing cancer 
                        Sterilize food                 
Pros - No electrical or water supply needed, smaller equipment, can kill living cells
Cons - can cause ionizations that damage tissue and DNA]]> 2023-05-30 18:26:46 UTC https://padlet.com/hglenville/5vqk1yt7afkd6x57/wish/2609473045 X Rays https://padlet.com/hglenville/5vqk1yt7afkd6x57/wish/2609473722 X-Rays are mostly used to examine the body.  They're mainly used to examine bones and joints. Sometimes they're used to detect problems affecting soft tissue, such as internal organs. X-rays helps to show problems like bone fractures or breaks.

 X-rays are a form of electromagnetic radiation similar to radio waves, microwaves, visible light and gamma rays. X-ray photons are highly energetic and have enough energy to break up molecules and hence damage living cells. When X-rays hit a material some are absorbed and others pass through. Generally, the higher the energy the more X-rays will pass through. The penetrating power that allows us to take internal images of the human body or objects.

X-rays are electromagnetic radiations of short wavelength and high frequency, with wavelengths ranging from 10-8 to 10-12 metres and frequencies of 1016 to 1020 hertz. X-rays use ionizing radiation to take photos. X-rays have enough energy to pass through the body, and they continue passing through until it hits a detector on the other side of the body.

Pros:
-X-rays may be quicker and less expensive than MRIs
-noninvasively and painlessly help to diagnose disease and monitor therapy
-support medical and surgical treatment planning
-guide medical personnel as they insert catheters, stents, or other devices inside the body, treat tumors, or remove blood clots or other blockages


Cons:
-possible long-term risks from radiation exposure, particularly in children and those who get frequent X-rays
-lack of detailed images, as an X-ray is a single, flat image rather than multiple images at different angles
]]> 2023-05-30 18:27:34 UTC https://padlet.com/hglenville/5vqk1yt7afkd6x57/wish/2609473722 Radio Waves https://padlet.com/hglenville/5vqk1yt7afkd6x57/wish/2609478846 Radio waves are the longest waves in the electromagnetic spectrum. They range from 1mm at 300 GHz to 10,000 kilometres at 30 Hz. 

Radio waves are generated by charged particles undergoing acceleration, such as time-varying electric currents.

Naturally occurring radio waves are emitted by lightning and astronomical objects, and are part of the blackbody radiation emitted by all warm objects.

Radio waves can be artificially generated by the use of a transmitter connected to an antenna to radiate the waves. They are then received by another antenna with a radio receiver to process the signal. 

Typically radio waves are used in radio communication, broadcasting, radar and radio navigation systems, communications satellites, and wireless computer networks.]]> 2023-05-30 18:33:09 UTC https://padlet.com/hglenville/5vqk1yt7afkd6x57/wish/2609478846 Ultraviolet https://padlet.com/hglenville/5vqk1yt7afkd6x57/wish/2609480268 William and Landy
Average wavelength 100-400nm
 Uses: 
  • Killing bacteria 
  • Creating fluorescent effects
  • Curing inks and resins
  • Phototherapy 
  • Suntanning
  • creation of Vitamin D
  • study the formation of stars in ultraviolet

Benefits and limitation

  • Benefits
    • Beneficial effects of UV radiation include the production of vitamin D
    • The World Health Organization (WHO) recommends 5 to 15 minutes of sun exposure 2 to 3 times a week.
  • Limitations
    • Sunburn is a sign of short-term overexposure, while premature aging and skin cancer are side effects of prolonged UV exposure.
    • UV exposure increases the risk of potentially blinding eye diseases, if eye protection is not used.
    • /Overexposure to UV radiation can lead to serious health issues, including cancer, and mental illness.
]]> 2023-05-30 18:34:53 UTC https://padlet.com/hglenville/5vqk1yt7afkd6x57/wish/2609480268 Microwaves https://padlet.com/hglenville/5vqk1yt7afkd6x57/wish/2609483116 wavelength of 0.1 m - 1 m

Uses:
  • bluetooth - uses 2.4 GHz microwaves 
  • microwave oven - emits microwaves which bounce around and gets absorbed by the food, causing the molecules to vibrate and the food to heart up

Pros:
  • doesn't require combustion to heat up food
  • heats food quickly

Cons:
  • communication limited to 48-64 km
  • exposure to radiation can be a health risk
]]> 2023-05-30 18:38:02 UTC https://padlet.com/hglenville/5vqk1yt7afkd6x57/wish/2609483116 Infrared MahlerFan69 https://padlet.com/hglenville/5vqk1yt7afkd6x57/wish/2609486341 Infrared waves range from 1 x 10^-3 to 7.0 x 10^-5m. At the smaller end, they are at the red edge of the visible light spectrum.
Infrared waves are essentially heatwaves. 

Applications (Besides being Heat):
- Thermal Imaging 
- Astronomy- examining objects in space
- Earth Science- examining changes to global surface temperature 

Benefits of thermal imaging technology: 
- Changes to emission of heat from the earth can help scientists track climate data and wildfires

- Objects in space such as stars can be seen through imaging and scientists can  estimate the age or size of stars

- The temperatures of people can be checked at places such as international borders to detect potentially ill / feverish people as well as smuggled animals


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