University:
Purdue University
Course:
PHYS 27200 | Electric And Magnetic Interactions
Academic year:

2023
Views:

55

Pages:

2
Author:

Lilyana Hurley

Qu12 content YOUTUBE KEY NASA EHS Video Worksheet: NASA's Tour of the Electromagnetic Spectrum Name: This video is available in eight sections on the NASA website. 01 Introduction (5:03) What is the name for all the electromagnetic waves that exist? EMS What are electromagnetic waves produced from? What two things do they have? Vibration of charged particles Crest Troughs What is the name for the section of the electromagnetic spectrum that we can see with our eyes? Visible light 02 Radio Waves (3:39) Where are radio waves on the electromagnetic spectrum in terms of energy and frequency? Longest Least Lowest Describe one thing that has been discovered using radio waves (three are described). Pulsars Plant clouds/Quasars What are radio waves used for by humans? Entertainment/Communication/Keyscientific 03 Microwaves (3:04) Where are Microwaves found on the electromagnetic spectrum? Between radio and infrared waves Describe one thing that C-Band Microwaves are used for? Used to monitor sea ice What did two scientists discover by accident using L-Band Microwaves? Cosmic microwave background Forest mapping GPS YOUR THOUGHTS: What is the most common use for microwaves today? OPINION. Heating food 04 Infrared Waves (5:22) What is unique about infrared waves compared to the visible light spectrum? Lower energy Reveal objects that cannot be seen due to light Where are infrared waves found on the electromagnetic spectrum? Below red light of visible spectrum Describe generally how the earth is heated from solar radiation. What type of waves are heat? GH effect Infrared waves 05 Visible Light Waves (4:50) What is unique about visible light waves? 380nm - 700nm The only part of the EMS that we can see What exactly is "White" light? Combo of ROYGBIV that we can see Why does Earth's atmosphere appear to be blue? N2 + O2 scatter blue light YOUR THOUGHTS: We see objects as having different colors. Why do these objects appear to be red, orange, yellow, green, blue, indigo, violet, or a combination of those colors? Reflection of those wavelengths Supporting Evidence Big Bang theory FLIR uses near IR If not highlighted, not on Q412 KEY 06 Ultraviolet Waves (3:40) Where are Ultraviolet Waves on the electromagnetic spectrum? just beyond violet 400nm - 10nm What are the different types of UV light? Which is the most harmful to humans? A long wave UV B short wave UV C - most harmful longest UV rays Why is the Ozone layer so important for humans? absorbs UV B and most of UV C YOUR THOUGHTS: What is UV light most commonly used for by humans? OPINION 07 X-Rays (2:50) Where are X-Rays on the electromagnetic spectrum? 3 - 0.03 nm high energy waves so small that some are no bigger than an atom Describe one thing that X-Rays are used for: MEDICAL imaging metals in Martian rocks; determine object temp 08 Gamma Rays (3:42) What are Gamma Rays created from? hottest, most violent energetic objects and events in the universe; and by natural radioactive decay; nuclear bombs, lightning Where are Gamma Rays on the electromagnetic spectrum? above X-rays What part of an atom can Gamma Rays collide with as it is used in Gamma Ray detectors? electrons detect charged particles YOUR THOUGHTS: Gamma rays have the most energy of all the electromagnetic waves. Do you think this is dangerous to humans? yes kills cancer cells also kills healthy cells

NASA EMS video

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