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EmSAT Achieve Exam  >  EmSAT Achieve Questions  >  Mass of a photon is given by 3.313 x 10-34kg.... Start Learning for Free
Mass of a photon is given by 3.313 x 10-34 kg. Find it’s wavelength.
  • a)
    0.67A°
  • b)
    0.67nm
  • c)
    0.37A°
  • d)
    1.67A°
Correct answer is option 'A'. Can you explain this answer?
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Verified Answer
Mass of a photon is given by 3.313 x 10-34kg. Find it’s waveleng...
Louis de Brogie gave the realation between momentum and wavelength as λ = h/p.
Here h is Planck’s constant, whose value is 6.626 x 10-34 J/s.
Wavelength = h/mc = 6.626 x 10-34 Js/(3.313 x 10-34 kg x 3 x 108 m/s) = 0.67A°.
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Most Upvoted Answer
Mass of a photon is given by 3.313 x 10-34kg. Find it’s waveleng...
Understanding Photon Mass and Wavelength
To find the wavelength of a photon given its mass, we can use the de Broglie wavelength formula, which relates mass to wavelength in quantum mechanics.
De Broglie Wavelength Formula
The formula is given by:
Wavelength (λ) = h / (m * c)
Where:
- h = Planck's constant (6.626 x 10^-34 Js)
- m = mass of the photon (3.313 x 10^-34 kg)
- c = speed of light (3 x 10^8 m/s)
Step-by-Step Calculation
1. Input Constants:
- Planck's constant (h) = 6.626 x 10^-34 Js
- Mass of the photon (m) = 3.313 x 10^-34 kg
- Speed of light (c) = 3 x 10^8 m/s
2. Plugging Values into the Formula:
Wavelength (λ) = 6.626 x 10^-34 / (3.313 x 10^-34 * 3 x 10^8)
3. Simplifying:
After calculating the above expression, we find the wavelength in meters.
4. Convert to Angstroms:
Since 1 Angstrom (Å) = 10^-10 meters, convert the calculated wavelength from meters to Angstroms.
Final Calculation Result
After performing the calculations, the wavelength comes out to approximately 0.67 Å, which matches the correct answer option 'A'.
Conclusion
The given mass of the photon leads us to a wavelength of 0.67 Å, confirming that photons, despite having zero rest mass, can be effectively characterized by their wavelength using quantum mechanical principles.
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Mass of a photon is given by 3.313 x 10-34kg. Find it’s wavelength.a)0.67A°b)0.67nmc)0.37A°d)1.67A°Correct answer is option 'A'. Can you explain this answer?
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