EM Spectrum

Question 1

series of EM waves arranged according to frequency and wavelength.

Answer 1

EM Spectrum

Question 2

discovered by Heinrich Hertz, longest of all EM Waves

Answer 2

Radio waves

Question 3

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

Answer 3

Radio waves

Question 4

• RADAR
• WIFI
• Bluetooth
• Automatic Doors
• Rfid
• QR CODE
• MRI

Answer 4

Radio waves

Question 5

• 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

Answer 5

radio waves

Question 6

discovered by James Clerk Maxwell, high frequency radio waves

Answer 6

Microwaves

Question 7

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

Answer 7

Microwaves

Question 8

weather forecast tool

Answer 8

Microwave Doppler Radar

Question 9

Microwave oven uses how many GHz?

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

Answer 9

2.45

Question 10

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

Answer 10

Microwave Ablation

Question 11

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

Answer 11

Microwave Tomography

Question 12

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

Answer 12

Infrared Waves

Question 13

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.

Answer 13

Infrared Waves

Question 14

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

Answer 14

Infrared waves

Question 15

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

Answer 15

Medical Infrared Imaging

Question 16

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

Answer 16

Heat Lamps

Question 17

our eyes are sensitive to EM Waves of wavelengths?

Answer 17

4x10-7 to 7x10-7

Question 18

order of lowest to highest frequency in colors? ROYGBV

Answer 18

RED
ORANGE
YELLOW
GREEN
BLUE
VIOLET

Question 19

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

Answer 19

Laser

Question 20

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

Answer 20

Optical Fiber

Question 21

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

Answer 21

Ultraviolet Radiation

Question 22

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

Answer 22

UVA

Question 23

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

Answer 23

UVB

Question 24

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

Answer 24

UVC

Question 25

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

Answer 25

UV Light (black light)

Question 26

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

Answer 26

X-Rays

Question 27

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

Answer 27

Long Wavelength X-Rays

Question 28

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

Answer 28

Short wavelength x-rays

Question 29

- computerized axial tomography - airport security checks

Answer 29

X-rays

Question 30

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

Answer 30

Gamma Rays

Question 31

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

Answer 31

Gamma Rays

Question 32

- 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

Answer 32

Gamma Rays

Question 33

uses gamma rays to destroys cancer cells

Answer 33

Radiotherapy

Question 34

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)

Answer 34

Ionizing Radiation

Question 35

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.

Answer 35

Non-Ionizing Radiation