The guard-condition on a transition indicates what?

The guard-condition on a transition indicates what?

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  1. Explanation:

    To calculate the wavelength of light, we use Rydberg's Equation:

    [tex]\frac{1}{\lambda}=R_H\left(\frac{1}{n_i^2}-\frac{1}{n_f^2} \right )[/tex]

    Where,

    [tex]\lambda[/tex]= Wavelength of radiation

    [tex]R_H[/tex] = Rydberg's Constant = [tex]1.097\times 10^7m^{-1}[/tex]

    [tex]n_f[/tex] = Higher energy level  

    [tex]n_i[/tex] = Lower energy level

    1)  The wavelength of the n=4 to n=1.

    [tex]n_i=1,n_f=4[/tex]

    Putting the values in above equation, we get:

    [tex]\frac{1}{\lambda }=1.097\times 10^7m^{-1}\left(\frac{1}{1^2}-\frac{1}{4^2} \right )\\\\\lambda =9.273\times 10^{-8}m=92.73 nm[/tex]

    [tex]1m=10^9nm[/tex]

    The region of this electromagnetic transition will be in a ultraviolet region.

    2) The wavelength of the n=4 to n=1.

    [tex]n_i=3,n_f=4[/tex]

    Putting the values in above equation, we get:

    [tex]\frac{1}{\lambda }=1.097\times 10^7m^{-1}\left(\frac{1}{3^2}-\frac{1}{4^2} \right )\\\\\lambda =1.875\times 10^{-6}m=1875 nm[/tex]

    [tex]1m=10^9nm[/tex]

    The region of this electromagnetic transition will be in an infrared region.

  2. The guard-condition on a transition indicates that if the specified trigger event occurs and the specified guard condition is true.

  3. Later

    Explanation:

    A sequence describes a particular order in which events happen. Establishing a sequence in your writing allows you to clarify to the reader how  the events of a story connect with each other. One of the words that can indicate a sequence is "later." By using the word "later," you establish that this event happened after the event you previously discussed.

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