Podcast
Questions and Answers
Which characteristic of electromagnetic waves is directly proportional to their energy?
Which characteristic of electromagnetic waves is directly proportional to their energy?
- Amplitude
- Wavelength
- Speed in a vacuum
- Frequency (correct)
What is a property that is shared by all regions of the electromagnetic spectrum?
What is a property that is shared by all regions of the electromagnetic spectrum?
- They all transfer energy. (correct)
- They are all visible to the human eye.
- They are all ionizing.
- They all have same wavelength.
What is the approximate speed at which electromagnetic waves travel through a vacuum?
What is the approximate speed at which electromagnetic waves travel through a vacuum?
- 3,000,000 m/s
- 300,000,000 m/s (correct)
- 300,000 m/s
- 30,000,000 m/s
Which types of electromagnetic radiation are classified as ionizing radiation?
Which types of electromagnetic radiation are classified as ionizing radiation?
How does ionizing radiation affect atoms and cells?
How does ionizing radiation affect atoms and cells?
What determines the properties of waves in the electromagnetic spectrum?
What determines the properties of waves in the electromagnetic spectrum?
Which of the following statements correctly describes the relationship between frequency and wavelength in the electromagnetic spectrum?
Which of the following statements correctly describes the relationship between frequency and wavelength in the electromagnetic spectrum?
Why is it important to understand the order of the electromagnetic spectrum?
Why is it important to understand the order of the electromagnetic spectrum?
How does the term 'radiation' apply in the context of electromagnetic waves compared to radioactive materials?
How does the term 'radiation' apply in the context of electromagnetic waves compared to radioactive materials?
Which of the following best describes the potential danger associated with short wavelength parts of the electromagnetic spectrum?
Which of the following best describes the potential danger associated with short wavelength parts of the electromagnetic spectrum?
Flashcards
Electromagnetic Spectrum
Electromagnetic Spectrum
A group of seven types of wave made up of electric and magnetic fields, differing in wavelength and frequency.
Wavelength
Wavelength
The distance between successive crests of a wave.
Frequency
Frequency
The number of waves that pass a fixed point in a given amount of time.
Energy and Frequency
Energy and Frequency
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Speed of EM Waves in Vacuum
Speed of EM Waves in Vacuum
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Ionising Radiation
Ionising Radiation
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Short Wavelength Hazards
Short Wavelength Hazards
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Study Notes
- The electromagnetic spectrum is a group of seven wave types composed of electric and magnetic fields.
- Waves in the electromagnetic spectrum have properties that depend on their wavelength and frequency.
- Higher frequencies in the electromagnetic spectrum transmit higher energies.
- All regions of the electromagnetic spectrum transfer energy.
- All electromagnetic waves travel at about 300,000,000 m/s (3 × 108 ms-1) through a vacuum (space).
- Radiation is a term used for both electromagnetic waves and energy emitted by radioactive materials.
- Short wavelength parts of the electromagnetic spectrum (ultraviolet, X-ray, and gamma ray) can interact with atoms and damage cells due to their high energy.
- This type of radiation is known as ionizing radiation.
- Ionizing radiation is able to remove electrons from atoms or molecules to produce positively charged particles called ions.
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Description
A group of seven wave types composed of electric and magnetic fields. Higher frequencies transmit higher energies. Ultraviolet, X-ray, and gamma ray can damage cells due to their high energy.
