The number of photons that are in the laser pulse is about :
1.03 × 10¹⁶ photons
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Further explanation
The term of package of electromagnetic wave radiation energy was first introduced by Max Planck. He termed it with photons with the magnitude is:
[tex]\large {\boxed {E = h \times f}}[/tex]
E = Energi of A Photon ( Joule )
h = Planck's Constant ( 6.63 × 10⁻³⁴ Js )
f = Frequency of Eletromagnetic Wave ( Hz )
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The photoelectric effect is an effect in which electrons are released from the metal surface when illuminated by electromagnetic waves with large enough of radiation energy.
[tex]\large {\boxed {E = \frac{1}{2}mv^2 + \Phi}}[/tex]
[tex]\large {\boxed {E = qV + \Phi}}[/tex]
E = Energi of A Photon ( Joule )
m = Mass of an Electron ( kg )
v = Electron Release Speed ( m/s )
Ф = Work Function of Metal ( Joule )
q = Charge of an Electron ( Coulomb )
V = Stopping Potential ( Volt )
Let us now tackle the problem!
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Given:
wavelength = λ = 532 nm = 532 × 10⁻⁹ m
energy = E = 3.85 mJ = 3.85 × 10⁻³ J
Asked:
number of photons = N = ?
Solution:
[tex]E = N h f[/tex]
[tex]E = N h \frac { c }{ \lambda }[/tex]
[tex]3.85 \times 10^{-3} = N \times 6.63 \times 10^{-34} \times \frac{3 \times 10^8}{ 532 \times 10^{-9} }[/tex]
[tex]\boxed{N \approx 1.03 \times 10^{16}}[/tex]
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Learn more
- Photoelectric Effect : https://brainly.com/question/1408276
- Statements about the Photoelectric Effect : https://brainly.com/question/9260704
- Rutherford model and Photoelecric Effect : https://brainly.com/question/1458544
- Photoelectric Threshold Wavelength : https://brainly.com/question/10015690
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Answer details
Grade: High School
Subject: Physics
Chapter: Quantum Physics
