Podcast
Questions and Answers
Which of the following correctly orders electromagnetic waves from longest to shortest wavelength?
Which of the following correctly orders electromagnetic waves from longest to shortest wavelength?
- X-rays, gamma rays, ultraviolet, visible, infrared, microwaves, radio waves
- Visible, infrared, microwaves, radio waves, gamma rays, X-rays, ultraviolet
- Gamma rays, X-rays, ultraviolet, visible, infrared, microwaves, radio waves
- Radio waves, microwaves, infrared, visible, ultraviolet, X-rays, gamma rays (correct)
Which of the following applications utilizes infrared waves?
Which of the following applications utilizes infrared waves?
- Satellite transmissions
- Heating up components in cell phones. (correct)
- Cancer treatment
- Medical imaging
Why is it important to protect ourselves from excessive exposure to ultraviolet (UV) radiation?
Why is it important to protect ourselves from excessive exposure to ultraviolet (UV) radiation?
- UV radiation interferes with radio wave transmissions.
- UV radiation can damage skin cells and increase the risk of skin cancer. (correct)
- UV radiation can cause overheating of electronic devices.
- UV radiation can lead to vitamin D deficiency.
As you move from infrared to ultraviolet within the visible light spectrum, what happens to the wavelength and frequency of the light?
As you move from infrared to ultraviolet within the visible light spectrum, what happens to the wavelength and frequency of the light?
Which activity does not effectively shield a person from harmful ultraviolet (UV) rays?
Which activity does not effectively shield a person from harmful ultraviolet (UV) rays?
Flashcards
EM Spectrum
EM Spectrum
Electromagnetic radiation arranged by frequency and wavelength.
Radiation
Radiation
Energy transfer through electromagnetic waves.
Infrared Waves
Infrared Waves
Wavelengths just beyond red light in the EM spectrum.
Ultraviolet (UV) Waves
Ultraviolet (UV) Waves
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EM Spectrum Energy Trend
EM Spectrum Energy Trend
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Study Notes
- EM Spectrum includes: Radio Waves, Microwaves, Infrared Wave, Visible, Ultraviolet Waves, X-Rays, and Gamma Rays
Colors of Visible Light Spectrum
- Red
- Orange
- Yellow
- Green
- Blue
- Indigo
- Violet
EM Spectrum Wave Examples in Everyday Life
- Radio Wave: used in radar
- Microwaves: heat up food, cell phones
- Infrared Waves: finding people and control devices
- Visible Light: to see color/light
- Ultraviolet Waves: protects Vitamin D
- X-Rays: bone bridges
- Gamma Rays: bombs, cancer
Matching Definitions
- Radiation: The transfer of energy as an electromagnetic wave
- Electromagnetic Spectrum: All the frequencies or wavelengths of electromagnetic radiation
- Infrared: Wavelengths immediately outside the red visible light range
- Ultraviolet: Wavelengths immediately outside the violet visible light range
Speed of EM Waves
- Travel at the speed of light
Shielding from Ultraviolet Waves
- Wear sunscreen or UV protectant clothing
Energy of Categories in EM Spectrum
- Energy increases, frequency gets higher, and wavelength gets shorter when traveling from left to right on the EM spectrum
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Description
Electromagnetic Spectrum includes radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays. EM waves transfer energy as electromagnetic radiation. They travel at the speedy of light and have different uses.
