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Questions and Answers
What is the primary difference between the various waves in the electromagnetic spectrum?
What is the primary difference between the various waves in the electromagnetic spectrum?
What is the primary use of ultraviolet waves?
What is the primary use of ultraviolet waves?
What is the purpose of X-rays in medical imaging?
What is the purpose of X-rays in medical imaging?
What is the law of reflection of light?
What is the law of reflection of light?
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What is the effect of concave mirrors on light?
What is the effect of concave mirrors on light?
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What is the law of refraction of light?
What is the law of refraction of light?
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What is the classification of light waves?
What is the classification of light waves?
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What is the definition of frequency in relation to waves?
What is the definition of frequency in relation to waves?
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What is the relationship between wavelength, frequency, and wave speed?
What is the relationship between wavelength, frequency, and wave speed?
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What is the classification of sound waves?
What is the classification of sound waves?
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What is the electromagnetic spectrum arranged by?
What is the electromagnetic spectrum arranged by?
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What is the wavelength of radiowaves used in communication?
What is the wavelength of radiowaves used in communication?
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What is an example of microwave use?
What is an example of microwave use?
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What is the mathematical formula for wave speed?
What is the mathematical formula for wave speed?
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What is the purpose of X-rays in medical applications?
What is the purpose of X-rays in medical applications?
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What type of wave is characterized by the compression and rarefaction of the medium?
What type of wave is characterized by the compression and rarefaction of the medium?
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What is the purpose of the hypothesis in a scientific experiment?
What is the purpose of the hypothesis in a scientific experiment?
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What is the main difference between refraction and reflection?
What is the main difference between refraction and reflection?
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What is the range of wavelengths or frequencies over which electromagnetic radiation extends?
What is the range of wavelengths or frequencies over which electromagnetic radiation extends?
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What is the purpose of gamma rays in medical applications?
What is the purpose of gamma rays in medical applications?
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Study Notes
Electromagnetic Spectrum
- The electromagnetic spectrum is a range of wavelengths or frequencies of electromagnetic radiation
- Types of electromagnetic radiation and their uses:
- Radio waves: Television transmission and radios, wavelength example: communication (long wavelengths), elephants
- Microwaves: Microwaves, weather and wifi, wavelength example: microwaves (shorter wavelengths), phones
- Infrared waves: Tv remote, collect thermal energy and heat lamps, wavelength example: heating lamps (shorter wavelengths), insects
- Visible light: Light/seeing, rainbow, wavelength: 400-700 nm
- Ultraviolet waves: Cause sunburns, uv lights in hospitals and sterilize medical equipment, wavelength: 100-400 nm, example: UV light, reptiles
- X-rays: Take images of bones, mammograms and checking for pneumonia, wavelength: 0.01-10 nm, example: Scanners, X-rays
- Gamma rays: Kill cancer cells and radioactive tracers
Reflection of Light
- Definition: Throwing back from a boundary the wave encounters without absorbing it
- Examples: Rear view mirror of cars, telescopes
- Law of reflection: Angle of incidence = angle of reflection
- Examples of use: Mirrors, reduction of heat
- Effect of concave mirrors: Diverge
- Effect of convex mirrors: Converge
Refraction of Light
- Definition: Change light undergoes when it enters a different medium
- Examples: Telescopes, form rainbows
- Law of refraction: As light travels from a denser medium to a less dense medium, it bends away from the normal
- Examples of use: Glasses, microscopes
- Effect of bi-convex lens: Converge
- Effect of bi-concave lens: Diverge
Waves
- Definition: A disturbance of the organized movement of water, air, and light
- Classification: Transverse (Light, microwave, UV, Ocean waves) or Longitudinal (Sound)
- Wave properties:
- Frequency: Number of times a wave passes through a point per second
- Wavelength: Distance between crest and crest
- Amplitude: Height from point zero to crest
- Period: Time between crest and crest
- Trough: Lowest point of wave
- Crest: Highest point in wave
- Wave speed formula: v = ƛ * f
- Relationship between wavelength, frequency, and wave speed: As wave speed increases, frequency decreases
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Description
This quiz covers various examples of electromagnetic waves, including visible light, ultraviolet, and X-rays, and their uses in different applications.
