Light Emission: Sun, Stars, and Moon
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Questions and Answers

Which of these objects emits its own light?

  • A mirror
  • The stars
  • The moon
  • The sun (correct)
  • What is the main difference between the sun and the moon in terms of how they produce light?

  • The sun reflects light, while the moon emits light
  • The sun has a higher temperature than the moon
  • The sun emits light, while the moon reflects light (correct)
  • The sun has a lower temperature than the moon
  • What is the approximate temperature of the sun's photosphere, where visible light is emitted?

  • 200°F
  • 20,000°F
  • -200°F
  • 10,000°F (correct)
  • What is the approximate temperature of the moon's surface in the sun?

    <p>200°F</p> Signup and view all the answers

    Which of the following objects does not emit its own light?

    <p>The moon</p> Signup and view all the answers

    Why can we look directly at the moon without special equipment, but not at the sun?

    <p>Looking directly at the moon does not damage our eyes, but looking directly at the sun can cause blindness</p> Signup and view all the answers

    Which of the following is the best explanation for why we can look at stars without going blind?

    <p>Stars are much farther away than the sun</p> Signup and view all the answers

    Why does a light bulb filament burn your finger when touched?

    <p>The filament has a temperature high enough to excite and emit electrons as visible light.</p> Signup and view all the answers

    Why does touching a friend's arm not burn your finger?

    <p>The arm's temperature is not high enough to excite electrons and emit visible light.</p> Signup and view all the answers

    According to the passage, what is the minimum temperature required for an object to emit visible light?

    <p>Around 100 Kelvin or over 700°F</p> Signup and view all the answers

    How can scientists determine if an object is emitting or reflecting light?

    <p>By measuring the object's temperature and comparing it to the wavelength of associated light.</p> Signup and view all the answers

    Why does a leaf outside appear green?

    <p>The leaf reflects green light from the sun while absorbing other wavelengths.</p> Signup and view all the answers

    Which of the following is an example of an object that emits light due to electricity?

    <p>A lightning bolt in the sky</p> Signup and view all the answers

    According to the passage, how can our eyes determine if an object is emitting or reflecting light?

    <p>Emitted light will appear brighter and cause eye strain or discomfort when viewed.</p> Signup and view all the answers

    Which of the following statements is true about objects that reflect light?

    <p>They can cast shadows if the reflected light source is bright enough.</p> Signup and view all the answers

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