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What is the wavelength of a photon with an energy of [tex][tex]$3.38 \times 10^{-19} J$[/tex][/tex]?

A. [tex][tex]$510 \, nm$[/tex][/tex]
B. [tex][tex]$460 \, nm$[/tex][/tex]
C. [tex][tex]$588 \, nm$[/tex][/tex]
D. [tex][tex]$416 \, nm$[/tex][/tex]


Sagot :

To determine the wavelength of a photon with an energy of [tex]\( 3.38 \times 10^{-19} \)[/tex] joules, we can use the relationship between energy [tex]\(E\)[/tex], Planck's constant [tex]\(h\)[/tex], and the speed of light [tex]\(c\)[/tex]. The formula to find the wavelength [tex]\(\lambda\)[/tex] of a photon is given by:

[tex]\[ \lambda = \frac{h \cdot c}{E} \][/tex]

where:
- [tex]\(E\)[/tex] is the energy of the photon,
- [tex]\(h\)[/tex] is Planck's constant ([tex]\(6.626 \times 10^{-34}\)[/tex] joule seconds),
- [tex]\(c\)[/tex] is the speed of light ([tex]\(3.00 \times 10^8\)[/tex] meters per second).

Step-by-Step Solution:

1. Identify the given values:
- Energy [tex]\(E = 3.38 \times 10^{-19}\)[/tex] joules
- Planck's constant [tex]\(h = 6.626 \times 10^{-34}\)[/tex] joule seconds
- Speed of light [tex]\(c = 3.00 \times 10^8\)[/tex] meters per second

2. Plug the values into the wavelength formula:

[tex]\[ \lambda = \frac{6.626 \times 10^{-34} \, \text{Js} \times 3.00 \times 10^8 \, \text{m/s}}{3.38 \times 10^{-19} \, \text{J}} \][/tex]

3. Calculate the wavelength [tex]\(\lambda\)[/tex]:

[tex]\[ \lambda = \frac{1.9878 \times 10^{-25} \, \text{Js} \cdot \text{m/s}}{3.38 \times 10^{-19} \, \text{J}} \][/tex]

[tex]\[ \lambda = 5.881 \times 10^{-7} \, \text{m} \][/tex]

4. Convert the wavelength from meters to nanometers:

[tex]\[ 1 \, \text{m} = 10^9 \, \text{nm} \][/tex]

[tex]\[ \lambda = 5.881 \times 10^{-7} \, \text{m} \times 10^9 \, \text{nm/m} \][/tex]

[tex]\[ \lambda = 588.1 \, \text{nm} \][/tex]

5. Compare the calculated wavelength to the given choices:
- A. [tex]\(510 \, \text{nm}\)[/tex]
- B. [tex]\(460 \, \text{nm}\)[/tex]
- C. [tex]\(588 \, \text{nm}\)[/tex]
- D. [tex]\(416 \, \text{nm}\)[/tex]

The wavelength most closely matches option C: [tex]\(588 \, \text{nm}\)[/tex].

Therefore, the correct answer is:
C. [tex]\(588 \, \text{nm}\)[/tex]
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