Part A Use the information for neon shown in the figure (Figure 1) to compute th

Question

Part A

Use the information for neon shown in the figure (Figure 1) to compute the energy difference for the 5sto3ptransition in neon.

Express your answer in electronvolts to three significant figures.

_____

Part B

Express your result found in part (A) in joules.

Express your answer in joules to three significant figures.

_______

Part C

Calculate the wavelength of a photon having this energy.

Express your answer in nanometers to three significant figures.

________

Part D

Compare your result in part (C) with the observed wavelength of the laser light.

Compare your result in part (C) with the observed wavelength of the laser light.

Part E

What is the wavelength of the light from the 3pto3s transition in neon?

Express your answer in nanometers to three significant figures.

_____

Explanation / Answer

Part A

Use the information for neon shown in the figure (Figure 1) to compute the energy difference for the 5sto3ptransition in neon.

Express your answer in electronvolts to three significant figures.

E5sE3p =

20.66-18.70=1.96

  eV  

Part B

Express your result found in part (A) in joules.

1 eV = 1.602176565·10-19 J

1.96 eV =3.14 *10^-19

Express your answer in joules to three significant figures.

E5sE3p =

_3.14 *10^-19

  J  

Part C

Calculate the wavelength of a photon having this energy.

Express your answer in nanometers to three significant figures.

Energy = hv or Planck Constant * Frequency

Frequency = Energy / Planck Constant

Frequency = 3.4 * 10^-19 / 6.626 * 10^-34 = 5.13 * 10^14 Hz

Wavelength = Speed of Light / Frequency
Wavelength = 3 * 10^8 / 5.13* 10^14

= 0.585 * 10^-6 metres = 585 nanometres

1 =

585

  nm  

Part D

Compare your result in part (C) with the observed wavelength of the laser light.

Compare your result in part (C) with the observed wavelength of the laser light.

This agrees with the observed wavelength for the laser light.

This is less than the observed wavelength for the laser light.

This is greater than the observed wavelength for the laser light.

The wavelength of the laser light is 632.8 nm. Thus This is less than the observed wavelength for the laser light

E5sE3p =

20.66-18.70=1.96

  eV  

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