science 3rd quarter

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Questions and Answers

Maxwell based his electromagnetic theory on the idea that a changing electric field gives rise to_____ and a changing magnetic field gives rise to _____.

  • magnetic field; an electric field (correct)
  • a magnetic field; another magnetic field
  • another electric field; an electric field
  • another electric field; another magnetic field

Who verified the existence of electromagnetic waves?

  • James Clerk Maxwell
  • both Hertz and Maxwell
  • neither Hertz nor Maxwell
  • Heinrich Hertz (correct)

Electromagnetic waves transport ____

  • energy (correct)
  • wavelength
  • electric charge
  • frequency

Which electromagnetic wave causes sunburn?

<p>ultraviolet rays (B)</p> Signup and view all the answers

Which of these electromagnetic waves are emitted by hot objects?

<p>infrared waves (A)</p> Signup and view all the answers

Which is true about all electromagnetic waves?

<p>All travel at the same speed. (B)</p> Signup and view all the answers

Which electromagnetic wave has the highest penetrating ability and is only emitted during high-energy nuclear reactions?

<p>gamma rays (A)</p> Signup and view all the answers

Which of the following is true about X-rays?

<p>They have a short wavelength and a high frequency. (C)</p> Signup and view all the answers

Which electromagnetic wave has the longest wavelength?

<p>radio waves (C)</p> Signup and view all the answers

Which electromagnetic wave has the highest frequency?

<p>gamma rays (A)</p> Signup and view all the answers

The image formed by a plane mirror is always ____________

<p>upright and laterally inversed (A)</p> Signup and view all the answers

Flashcards

Maxwell's Electromagnetic Theory

A changing electric field gives rise to a magnetic field, and a changing magnetic field gives rise to an electric field.

Who was Heinrich Hertz?

He experimentally verified the existence of electromagnetic waves.

What do electromagnetic waves transport?

Electromagnetic waves are a form of energy transfer.

Sunburn Cause

Ultraviolet (UV) rays are a type of electromagnetic radiation that can cause sunburn.

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Waves from Hot Objects

Infrared waves are emitted by hot objects.

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Electromagnetic Wave Speed

All electromagnetic waves travel at the same speed (the speed of light) in a vacuum.

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Gamma Rays

Gamma rays have the highest penetrating ability and are emitted during high-energy nuclear reactions.

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X-Ray Properties

X-rays have a short wavelength and a high frequency.

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Longest Wavelength EM Wave

Radio waves have the longest wavelength in the electromagnetic spectrum.

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Highest Frequency EM Wave

Gamma rays have the highest frequency in the electromagnetic spectrum.

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Image With Plane Mirror

Upright and Laterally Inverted.

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