Spectral lines

Which of the following has a minimum wavelength?

• 2. microwave

• 2. Infrared rays

• 2. Blue light

• 1. Gamma rays

What is an emission spectrum?

• The spectrum of light emitted by a hot object.
  

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  The spectrum of light absorbed by an object.
  

• 
  The spectrum of light emitted or absorbed by an object.
  

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  The spectrum of light reflected by an object.

What does each line or band in an emission spectrum represent?

• A specific wavelength of light emitted by the source.
  

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  A specific wavelength of light absorbed by the source.
  

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  A specific color of light emitted by the source.
  

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  A specific color of light absorbed by the source.

Which type of emission spectrum consists of continuous wavelengths with no gaps or lines?

• Absorption spectrum
  

• 
  Line emission spectrum
  

• 
  Band emission spectrum
  

• Continuous emission spectrum

What information can be obtained from the emission spectrum of an element?

• Its mass
  

• Its temperature
  

• 
  Its density
  

• Its atomic composition and energy levels

Which scientific tool is commonly used to analyze and record emission spectra?

• Microscope
  

• 
  Spectroscope
  

• 
  Telescope
  

• 
  Caliper

What does the term 'redshift' in an emission spectrum refer to?

• The shift of spectral lines towards shorter wavelengths.
  
  

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  The shift of spectral lines towards longer wavelengths.
  

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  The absence of spectral lines in a spectrum.
  

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  The interference of spectral lines with each other.

What causes an absorption spectrum?

• Electronic transitions of an element's atoms or molecules from lower energy states to higher energy states.
  

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  The scattering of light by particles in the medium.
  

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  The reflection of light from the surface of an object.
  

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  The transmission of light through a medium.

Which type of emission spectrum is produced by incandescent solids, liquids, and dense gases?

• Continuous emission spectrum
  

• 
  Line emission spectrum
  

• 
  Absorption spectrum
  

• 
  Band emission spectrum

Which type of emission spectrum exhibits a few distinct lines on a dark background?

• Continuous emission spectrum
  

• 
  Absorption spectrum
  

• 
  Band emission spectrum
  

• 
  Line emission spectrum