- 1(current)
Q. No.Photons and electrons of the same wavelength are compared. Which one carries larger momentum?
| 1. | photon |
| 2. | electron |
| 3. | neither, since both have equal momenta |
| 4. | it could be either, depending on the energy |
Subtopic: Â De-broglie Wavelength |
 66%
Level 2: 60%+
Hints
A particle is dropped from a height \(H.\) The de-Broglie wavelength of the particle as a function of height is proportional to:
1. \(H\)
2. \(H^{1/2}\)
3. \(H^{0}\)
4. \(H^{-1/2}\)
Subtopic: Â De-broglie Wavelength |
 66%
Level 2: 60%+
Hints
The graph that shows the variation of the de-Broglie wavelength \((\lambda)\) of a particle and its associated momentum \((p)\) is:
| 1. |  |
2. |  |
| 3. |  |
4. |  |
Subtopic: Â De-broglie Wavelength |
 84%
Level 1: 80%+
NEET - 2022
Hints
What is the de-Broglie wavelength associated with an electron moving at a speed of \(5.4\times10^6~\text{m/s}\)?
| 1. | \(0.244~\text{nm}\) | 2. | \(0.135~\text{nm}\) |
| 3. | \(0.157~\text{nm}\) | 4. | \(0.111~\text{nm}\) |
Subtopic: Â De-broglie Wavelength |
 72%
Level 2: 60%+
Hints
Links
An electron (mass \(m\)) with an initial velocity \(\vec{v}={v}_0 \hat{i}\) \(({v}_0>0)\) constant ) . Its de-Broglie wavelength at time \(t\) is given by:
| 1. | \(\dfrac{\lambda_0}{\left(1+\dfrac{e E_0}{m} \dfrac{t}{{v}_0}\right)}\) | 2. | \(\lambda_0\left(1+\dfrac{e E_0 t}{m {v}_0}\right)\) |
| 3. | \(\lambda_0 \) | 4. | \(\lambda_0t\) |
Subtopic: Â De-broglie Wavelength |
 76%
Level 2: 60%+
Hints
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Photons of wavelength \(\lambda\) cause the emission of photoelectrons from a metallic surface, the de-Broglie wavelength of the fastest photoelectron being \(\lambda_d\). A graph of \(\dfrac{1}{\lambda} \text { vs } \dfrac{1}{\lambda_{d}}\) is:
| 1. | a straight line passing through the origin. |
| 2. | a circle. |
| 3. | an ellipse. |
| 4. | a parabola. |
Subtopic: Â De-broglie Wavelength |
Level 3: 35%-60%
Hints
The de-Broglie wavelength associated with an electron, accelerated by a potential difference of \(81\) V is given by:
1. \(13.6\) nm
2. \(136\) nm
3. \(1.36\) nm
4. \(0.136\) nm
1. \(13.6\) nm
2. \(136\) nm
3. \(1.36\) nm
4. \(0.136\) nm
Subtopic: Â De-broglie Wavelength |
 58%
Level 3: 35%-60%
NEET - 2023
Hints
- 1(current)
Q. No.
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