Chapter 7 Test

What determines if an electromagnetic wave emitted from an object is a visible light wave or a wave of infrared light?

• Room temperature objects emit infrared radiation while hotter objects emit visible light.
  

• Infrared is emitted near absolute zero, visible light from cooler objects.

  
  

• Visible light comes from non-luminous and cold objects.

  
  

• Visible light is from room-temperature objects, infrared warmer.

  
  

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What model of light does the polarization of light support? Polarized light is explained

• by electrons absorbing energy.

  
  

• by the light ray model.

  
  

• only by a wave model.

  
  

• only by refraction and reflection.

  
  

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Which color of light carries more energy per photon?

• Blue

• Green

• Orange

• Red

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Light of which of the following colors carries the least energy per photon?

• Blue

• Green

• Orange

• Red

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What model of light does the photoelectric effect support? The photoelectric effect is explained

• only by a wave model.

  
  

• by a particle model.

  
  

• by the light ray model.

  
  

• only by refraction and reflection.

  
  

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What happens when light is absorbed by a material?

• The temperature of the material can increase.

  
  

• The light may be re-emitted at a different wavelength.

  
  

• The light energy becomes internal energy.

  
  

• All of the above

  
  

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Which of the following stars has the highest temperature?

• Bluish

• Reddish

  
  

• Yellowish

• Orange-red

  
  

The color difference in stars is a result of the relationship between the color and

• age

• temperature

• size

• composition

When does total internal reflection occur in water? (Check all that apply.)

• When the incident ray is 49°

  
  

• When the angle of refraction reaches 90°

  
  

• At the critical angle for water

  
  

Why does total internal reflection occur more in a diamond than in other gemstones?

• Small critical angle

  
  

• The critical angle is about 49°

  
  

• No critical angle

  
  

• Large critical angel