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Science 2Q > EM Spectrum > Flashcards

EM Spectrum Flashcards

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1
Q

series of EM waves arranged according to frequency and wavelength.

A

EM Spectrum

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2
Q

discovered by Heinrich Hertz, longest of all EM Waves

A

Radio waves

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3
Q

produced by making electrons vibrate in an antenna and is used to transmit sound and picture information over long distances

A

Radio waves

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4
Q
  • RADAR
  • WIFI
  • Bluetooth
  • Automatic Doors
  • Rfid
  • QR CODE
  • MRI
A

Radio waves

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5
Q
  • long distance communication and navigation
  • broadcasting
  • tags for use in building access
  • public transportation
  • electronic payment systems
  • aircraft communication
  • police comms
  • modern mobile phones
  • GPS
  • satellite communication
A

radio waves

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6
Q

discovered by James Clerk Maxwell, high frequency radio waves

A

Microwaves

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7
Q

can penetrate the atmosphere of the earth used for long distance phone calls, send signals for cable television as well as audio and video feeds from production vans to broadcast stations

A

Microwaves

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8
Q

weather forecast tool

A

Microwave Doppler Radar

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9
Q

Microwave oven uses how many GHz?

The microwave cooks food by transferring energy to the water molecules in the food

A

2.45

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10
Q

uses the heat of microwaves to shrink or destroy tumors and is used to monitor the progress of treatment in breast cancer

A

Microwave Ablation

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11
Q

used to differentiate malignant breast cancer from benign and normal breast cancer

A

Microwave Tomography

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12
Q

discovered by Sir William Herschel, “below red” , have lower frequency than the red part of visible light

A

Infrared Waves

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13
Q

we do not see it but we feel it as heat, we give this kind of waves proportional to our temperature, higher temperature produce shorter rays of this kind of wave.

A

Infrared Waves

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14
Q
  • remote controls for television
  • burglar alarm system
  • night vision camera
  • cellphone
A

Infrared waves

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15
Q

used for diagnosis and prognosis in areas like oncology, rheumatology, sports medicine and orthopedics

A

Medical Infrared Imaging

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16
Q

It is a device that makes use of infrared waves, used by physiotherapists to heal sports injuries

A

Heat Lamps

17
Q

our eyes are sensitive to EM Waves of wavelengths?

A

4x10-7 to 7x10-7

18
Q

order of lowest to highest frequency in colors? ROYGBV

A

RED
ORANGE
YELLOW
GREEN
BLUE
VIOLET

19
Q

light amplification by stimulated emission of radiation and is used in medical procedures such as optical imaging, surgery, endoscopy and treatment

A

Laser

20
Q

replaced telephone wires and uses visible light to transmit signals at high speed and or long distances

A

Optical Fiber

21
Q

discovered by Johann Wilhelm Ritter and its main source is the sun with the kinds UVA, UVB and UVC

A

Ultraviolet Radiation

22
Q

KIND OF ULTRAVIOLET RADIATION: accounts for the 95% of the solar UV reaching the earth, 315nm to 400nm

A

UVA

23
Q

KIND OF ULTRAVIOLET RADIATION: filtered by the ozone in the atmosphere, 280nm to 314nm

A

UVB

24
Q

KIND OF ULTRAVIOLET RADIATION: almost completely absorbed by the atmosphere and does not reach the earth’s surface, 60nm to 279 nm

A

UVC

25
Q

used to detect forged bank, forensic invesigations, sterilize medical equipment and purify water

A

UV Light (black light)

26
Q

discovered by Wilhelm Conrad Roentgen and is sometimes called Roentgen rays. He did not know their nature of origin

A

X-Rays

27
Q

a type of x-ray that penetrates the flesh but not the bones and is useful in diagnosing bone fractures and tumors

A

Long Wavelength X-Rays

28
Q

a type of x-ray that can penetrate even through metals and is used in the industry to inspect welded joints for faults

A

Short wavelength x-rays

29
Q
  • computerized axial tomography
  • airport security checks
A

X-rays

30
Q

discovered by Paul Villard and is highly penetrating because of their very short wavelengths

A

Gamma Rays

31
Q
  • given off by radioactive materials
  • sources: sun, clouds of interstellar matter, remnants of supernova
  • can be blocked with lead and thick concrete
A

Gamma Rays

32
Q
  • used in industries to detect cracks in metals and sterilize equipment
  • food irradiation kills bacteria, insects, and parasites that can cause food-borne diseases
  • helps breed new seed varieties with higher yields and eradicate pests
A

Gamma Rays

33
Q

uses gamma rays to destroys cancer cells

A

Radiotherapy

34
Q

is a type of energy released by atoms that travels in
the form of electromagnetic waves (gamma or X-rays) or particles (neutrons, beta or alpha)

A

Ionizing Radiation

35
Q

is a type of low-energy radiation that does not have enough energy to remove an electron (negative particle) from an atom or molecule. Most types these have not been found to cause cancer.

A

Non-Ionizing Radiation

Science 2Q (2 decks)

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