Electromagnetic Spectrum Applications

Questions and Answers

What is the primary difference between the various waves in the electromagnetic spectrum?

Frequency

Different uses for each wave (correct)

Speed

Wavelength

What is the primary use of ultraviolet waves?

Scanning

Medicinal purposes

Communication

Reptile care (correct)

What is the purpose of X-rays in medical imaging?

Dental exams

Bone fracture analysis

Scan internal organs

All of the above (correct)

What is the law of reflection of light?

Angle of incidence = angle of reflection Signup and view all the answers

What is the effect of concave mirrors on light?

Diverge Signup and view all the answers

What is the law of refraction of light?

Light bends away from the normal Signup and view all the answers

What is the classification of light waves?

Transverse Signup and view all the answers

What is the definition of frequency in relation to waves?

Number of times a wave passes through a point per second Signup and view all the answers

What is the relationship between wavelength, frequency, and wave speed?

Wave speed is equal to the product of frequency and wavelength Signup and view all the answers

What is the classification of sound waves?

Longitudinal Signup and view all the answers

What is the electromagnetic spectrum arranged by?

Wavelength Signup and view all the answers

What is the wavelength of radiowaves used in communication?

Not specified Signup and view all the answers

What is an example of microwave use?

Microwaves Signup and view all the answers

What is the mathematical formula for wave speed?

v = λ * f Signup and view all the answers

What is the purpose of X-rays in medical applications?

To take images of bones and check for pneumonia Signup and view all the answers

What type of wave is characterized by the compression and rarefaction of the medium?

Longitudinal wave Signup and view all the answers

What is the purpose of the hypothesis in a scientific experiment?

To make a prediction about the outcome Signup and view all the answers

What is the main difference between refraction and reflection?

Refraction occurs in a medium, while reflection occurs at a boundary Signup and view all the answers

What is the range of wavelengths or frequencies over which electromagnetic radiation extends?

Electromagnetic spectrum Signup and view all the answers

What is the purpose of gamma rays in medical applications?

To kill cancer cells Signup and view all the answers

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.