Electron and matter waves: WE NEED HELP

In summary, the de Broglie wavelength of a 1.00Kev electron is 1.23 * 10^-9 meters, the de Broglie wavelength of a 1.00Kev photon is 0 meters (since photons do not have mass), and the de Broglie wavelength of a 1.00KeV neutron is 1.23 * 10^-12 meters.
  • #1
afcwestwarrior
457
0
Electron and matter waves: WE NEED HELP!

Homework Statement


Calculate the de Broglie wavelength of (a) a 1.00Kev electron, (b) a 1.00Kev photon, and (c) a 1.00KeV neutron


Homework Equations


K = mv^2 / 2

p = mv

p = sqrt 2KM

m of electron is 9.11 * 10^-31 kg

1 ev = 1.6 * 10^-19 Joules

change in Lamda = h / p

h = 6.63 *^-34


The Attempt at a Solution




Is this correct. Here's what we tried.
)
change in lamda = 6.63 * 10 ^ -34 / sqrt(2) ( 9.11 * 10 ^-31) ( 1KeV) (1000eV / 1Kev) (1.6 * 10 ^ -19 J)

=



=
 
Physics news on Phys.org
  • #2


Looks like you are setting things up okay. So what is the result of your calculation?

A couple of minor points:
The energy and mass belong inside the sqrt(), it's not clear if you are meaning to do that from what you wrote.
The "J" at the end of your expression should really be "J/eV" to do the units conversion properly.
 

FAQ: Electron and matter waves: WE NEED HELP

1. What are electron and matter waves?

Electron and matter waves are a type of wave motion that describes the behavior of subatomic particles, such as electrons. These waves have both particle-like and wave-like properties, and their behavior is described by the principles of quantum mechanics.

2. How are electron and matter waves different from other types of waves?

Electron and matter waves are different from other types of waves, such as light waves or sound waves, because they describe the behavior of particles rather than energy or motion in a medium. They also have unique properties, such as the ability to exist in multiple states at once.

3. What is the significance of electron and matter waves in modern science?

Electron and matter waves are essential in understanding the behavior of subatomic particles and are the basis for many modern technologies, such as transistors and lasers. They also play a crucial role in fields like quantum computing and particle physics.

4. How are electron and matter waves studied and observed?

Electron and matter waves are studied and observed through experiments, such as the double-slit experiment, which demonstrate their wave-like behavior. They can also be observed indirectly through the effects they have on other particles, such as in the behavior of electrons in an atom.

5. What are some current research topics related to electron and matter waves?

Some current research topics related to electron and matter waves include the development of new technologies and devices that utilize their unique properties, as well as further exploration of their behavior in different environments, such as in extreme conditions or in different materials.

Similar threads

Photons and matter waves: The photon of quantum light: I
Replies
14
Views
3K
Solving Electron Acceleration and Reflection Problems
Replies
1
Views
2K
How Is Electric Potential Difference Calculated in a TV Tube?
Replies
34
Views
2K
Transmisson and Reflection (Quantum)
Replies
1
Views
1K
Relativistic Kinetic energy, momentum, speed.
Replies
3
Views
3K
Compare the wavelengths of a photon and an electron
Replies
2
Views
3K
De Broglie wave length, average electron energy and momentum calculation
Replies
1
Views
1K
What is the wavelength of an electron moving at 1 m/s?
Replies
5
Views
6K
What is the effective mass of electrons and holes in germanium?
Replies
3
Views
1K
Estimate the uncertainty in electron's position.
Replies
4
Views
1K

Hot Threads

Recent Insights

Back
Top