Understanding the Relationship between Energy, Frequency, and Wavelength

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In summary, De Broglie's equation (E=hf and λ=E/hc) relates the energy, frequency, and wavelength of a particle and is significant in establishing wave-particle duality and contributing to the development of quantum mechanics. It suggests that particles can exhibit both wave-like and particle-like behavior, with a wavelength and mass, and Planck's constant (h) is used to support this concept. Additionally, De Broglie's equation is related to the uncertainty principle, as the more precisely we know the wavelength of a particle, the less we know about its momentum. Finally, De Broglie's equation can be applied to all particles, but is most noticeable for those with small masses and high velocities.
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semc
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Hi guys, let's see f=1/λ right? E = hf so f=h/E ==> λ =E/h?? E=hc/λ ==> λ=E/hc? Which part did i get it mixed up?
 
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semc said:
Hi guys, let's see f=1/λ right? E = hf so f=h/E ==> λ =E/h?? E=hc/λ ==> λ=E/hc? Which part did i get it mixed up?
For starters, your algebra: "E = hf so f=h/E " and "E=hc/λ ==> λ=E/hc? ". Also look up the universal wave equation: [itex]f \ne 1/\lambda[/itex]

AM
 
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  • #3


Hi there! It seems like you have mixed up the equations for frequency (f) and wavelength (λ). The correct relationship between them is λ = c/f, where c is the speed of light. So, in the equation E = hf, f = E/h. This means that the higher the energy (E), the higher the frequency (f). However, in the equation λ = hc/E, f = c/λ. This means that the shorter the wavelength (λ), the higher the frequency (f). I hope this helps clarify things for you. Keep up the good work!
 

1. What is the significance of De Broglie's equation, E=hf and λ=E/hc?

De Broglie's equation relates the energy of a particle (E) to its frequency (f) and wavelength (λ). It also shows the relationship between energy and Planck's constant (h) and the speed of light (c). This equation is significant because it helped to establish the concept of wave-particle duality and contributed to the development of quantum mechanics.

2. How does De Broglie's equation relate to the wave-particle duality?

De Broglie's equation suggests that particles, such as electrons, can exhibit both wave-like and particle-like behavior. This means that they have a wavelength, similar to a wave, but also possess mass and can be localized in space like a particle. This concept is known as wave-particle duality.

3. What is the significance of Planck's constant (h) in De Broglie's equation?

Planck's constant is a fundamental constant in quantum mechanics that relates the energy of a photon to its frequency. In De Broglie's equation, Planck's constant is used to relate the energy of a particle to its frequency and wavelength, further supporting the concept of wave-particle duality.

4. How does De Broglie's equation relate to the uncertainty principle?

The uncertainty principle states that it is impossible to know both the exact position and momentum of a particle simultaneously. De Broglie's equation supports this principle by showing that the wavelength of a particle is inversely related to its momentum. Therefore, the more precisely we know the wavelength of a particle, the less we know about its momentum, and vice versa.

5. Can De Broglie's equation be applied to all particles?

Yes, De Broglie's equation can be applied to all particles, regardless of their mass or speed. However, its effects are most noticeable for particles with very small masses, such as electrons, due to their high velocities and short wavelengths.

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