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Eighth Grade (Grade 8) Light and Optics Questions

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Grade 8 Light and Optics
Which of the following is true about an apple that appears red?
  1. it absorbs red light and reflects all others
  2. it reflects red light and absorbs all others
  3. it transmits red light and reflects all others
  4. it reflects red light and transmits all others
Grade 8 Light and Optics
Grade 8 Light and Optics
An object that transmits light with scattering can be described as:
  1. transparent
  2. translucent
  3. opaque
  4. none of the above
Grade 8 Light and Optics
When light is produced using heat, it is called:
  1. Luminescence
  2. Incandescence
  3. Fluorescence
  4. Flammable
Grade 8 Light and Optics
Which of the following best explains why fluorescent bulbs are more efficient than incandescent bulbs?
  1. fluorescent bulbs use bioluminescent algae
  2. fluorescent bulbs get hot faster
  3. fluorescent bulbs generate light without generating a lot of waste heat
  4. fluorescent bulbs have more free floating electrons to generate light.
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