Electromagnetic Waves and Spectrum Quiz
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Questions and Answers

Who is known as the father of electromagnetic theory?

  • James Clerk Maxwell (correct)
  • Isaac Newton
  • Nikola Tesla
  • Albert Einstein

    • Diffraction is the process of light bouncing off an object in various directions.

    False

    What does a spectrometer use to separate light into a spectrum?

    diffraction

    When molecules move and vibrate, the heat becomes _____.

    <p>thermal energy</p> Signup and view all the answers

    Match the following concepts with their definitions:

    <p>Diffraction = Bending and spreading of waves around an obstacle Scattering = Light bounces off an object in various directions Thermal energy = Energy emitted from an object due to heat Spectrometer = Device used to separate light into a spectrum</p> Signup and view all the answers

    What type of rays carry the most energy and have the shortest wavelengths?

    <p>Gamma rays</p> Signup and view all the answers

    Gamma rays can penetrate deep into tissues and cause damage to cells.

    <p>True</p> Signup and view all the answers

    What is needed to stop gamma rays from penetrating materials?

    <p>3-4 feet thick concrete</p> Signup and view all the answers

    Gamma rays are released by _______ reactions in nuclear plants.

    <p>nuclear</p> Signup and view all the answers

    Match the following figures with their primary contributions:

    <p>Plato = Philosophical discussions about reality Pythagoras = Early work on harmonics and sound waves Gamma rays = Treatment of cancers Dense materials = Stopping gamma rays</p> Signup and view all the answers

    What did Michelson determine about the speed of light in empty space?

    <p>2.9979 x 10^8 m/s</p> Signup and view all the answers

    Plank's constant is equal to 3.00 x 10^8 Js.

    <p>False</p> Signup and view all the answers

    What is the equation that represents the relationship between speed of light, wavelength, and frequency?

    <p>c = λf</p> Signup and view all the answers

    The energy of a photon can be calculated using the formula e = _____.

    <p>hf</p> Signup and view all the answers

    Match the following properties of light with their descriptions:

    <p>Light travels in straight lines = Light does not bend around obstacles Light travels very fast = Approximately 300,000 km per second Light travels much faster than sound = We see lightning before we hear thunder Luminous objects = Objects that produce their own light</p> Signup and view all the answers

    Who is associated with the scattering of x-rays?

    <p>Arthur Compton</p> Signup and view all the answers

    Luminous objects are defined as those that reflect light.

    <p>False</p> Signup and view all the answers

    What is the wavelength range of visible light?

    <p>400 nm to 700 nm</p> Signup and view all the answers

    According to Pythagorean followers, what are particles emitted from objects responsible for?

    <p>Seeing objects because they reflect light into our eyes.</p> Signup and view all the answers

    Absorption occurs when photons from incident light hit atoms and cause them to vibrate.

    <p>True</p> Signup and view all the answers

    Who discovered X-rays?

    <p>Wilhelm Conrad Roentgen</p> Signup and view all the answers

    Ultraviolet light has wavelengths ranging from _____ nm to _____ nm.

    <p>400, 10</p> Signup and view all the answers

    What is NOT an effect of too much UV light exposure?

    <p>Production of Vitamin D</p> Signup and view all the answers

    Match the types of electromagnetic radiation with their uses:

    <p>Visible light = Allows humans to see Ultraviolet light = Promotes Vitamin D production X-rays = Medical imaging Infrared light = Used for finding people in the dark</p> Signup and view all the answers

    What are the consequences of excessive exposure to UV light?

    <p>Sunburn and cancer</p> Signup and view all the answers

    The frequencies of visible light are higher than those of _____ waves.

    <p>infrared</p> Signup and view all the answers

    Who proposed a comprehensive mathematical wave theory for light?

    <p>Augustin Fresnel</p> Signup and view all the answers

    The law of reflection states that the angle of incidence is greater than the angle of reflection.

    <p>False</p> Signup and view all the answers

    In what year did Christian Huygens make significant contributions to the properties of light?

    <p>1678</p> Signup and view all the answers

    Christian Huygens proposed that light behaves like a _____.

    <p>wave</p> Signup and view all the answers

    What phenomenon did Thomas Young demonstrate to support the wave theory of light?

    <p>Interference</p> Signup and view all the answers

    Match the following terms with their definitions:

    <p>Reflection = The bouncing back of light when it hits a surface Refraction = The bending of light as it passes through different media Shadow = A dark area caused by blocked light Ray model of light = Represents light as traveling in straight lines</p> Signup and view all the answers

    James Clerk Maxwell contributed to the understanding of electromagnetic waves in 1865.

    <p>True</p> Signup and view all the answers

    What does Planck's explanation of EM radiation imply about light?

    <p>It is quantized.</p> Signup and view all the answers

    What describes the behavior of light as it passes through different media?

    <p>Refraction</p> Signup and view all the answers

    Snell's law states that the sine of the angle of incidence is equal to the sine of the angle of refraction.

    <p>False</p> Signup and view all the answers

    What is the speed of light in a vacuum?

    <p>3.00 x 10^8 m/s</p> Signup and view all the answers

    The index of refraction (n) describes the speed of change in __________.

    <p>light</p> Signup and view all the answers

    Match the gases with their respective indices of refraction:

    <p>Air = 1.000 293 Carbon Dioxide = 1.000 45 Oxygen = 1.000 271 Hydrogen = 1.000 73</p> Signup and view all the answers

    Which of the following is NOT a property of reflection?

    <p>Bends the light</p> Signup and view all the answers

    What is the term for the incoming light beam before it hits a boundary?

    <p>Incident ray</p> Signup and view all the answers

    The angle of refraction is always smaller than the angle of incidence.

    <p>False</p> Signup and view all the answers

    Study Notes

    Electromagnetic Waves

    • Electromagnetic waves are a type of transverse wave
    • They consist of oscillating electric and magnetic fields perpendicular to each other
    • These waves do not require a medium to travel through
    • The frequency and wavelength are inversely proportional
    • The higher the frequency, the more energy the wave carries
    • Examples include radio waves, microwaves, infrared waves, visible light, ultraviolet waves, X-rays, and gamma rays

    Electromagnetic Spectrum

    • The entire range of EM waves, ordered by increasing frequency and decreasing wavelength
    • Includes radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays
    • Each type has different wavelengths and frequencies
    • Different applications depending on the type

    Wave Behavior

    • Reflection: When light bounces off a surface
    • Diffraction: Waves bending around an obstacle
    • Absorption: When light is absorbed by a material, converting energy into heat or another form
    • Scattering: Light bouncing off an object in different directions

    Wave Properties

    • Crest: Highest point of a wave
    • Trough: Lowest point of a wave
    • Wavelength: Distance between two consecutive crests or troughs
    • Frequency: Number of waves passing a point per second
    • Speed: Speed of light is constant (3.00 x 10^8 m/s)
    • Energy: Energy of the wave is proportional to frequency (E=hf)

    Speed of Light

    • Light travels at a constant speed of approximately 3.00 x108 m/s in a vacuum.

    Snell's Law

    • Describes how light bends when it passes from one medium to another (refraction)
    • Related to the angle of incidence, angle of refraction, and refractive index of the two media
    • The equation is n1sinθ1 = n2sinθ2, where n is the refractive index and θ is the angle.

    Visible Light

    • A small part of the electromagnetic spectrum
    • Visible to the human eye
    • Ranges from red (longest wavelength) to violet (shortest wavelength).

    Substances

    • Different substances have different refractive indices, which affect how light travels through them

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    Related Documents

    Science 10 Second Quarter Electromagnetic Waves PDF

    Description

    Test your knowledge on electromagnetic waves, their properties, and behavior. This quiz covers topics such as the electromagnetic spectrum, wave behavior including reflection, diffraction, and absorption. Delve into the different types of waves and their applications in various fields.

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