What is the momentum of a photon in an X-ray beam of 10-10 meter wavelength?

 1 $$1.5 \times 10^{-23} \mathrm{~kg}-\mathrm{m} / \mathrm{sec}$$ 2 $$6.6 \times 10^{-24} \mathrm{~kg}-\mathrm{m} / \mathrm{sec}$$ 3 $$6.6 \times 10^{-44} \mathrm{~kg}-\mathrm{m} / \mathrm{sec}$$ 4 $$2.2 \times 10^{-52} \mathrm{~kg}-\mathrm{m} / \mathrm{sec}$$

Subtopic:  De-broglie Wavelength |
90%
From NCERT
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Which of the following figures represents the variation of the particle momentum and the associated de-Broglie wavelength?

 1 2 3 4
Subtopic:  De-broglie Wavelength |
85%
From NCERT
NEET - 2015
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What is the de-Broglie wavelength of a neutron in thermal equilibrium with heavy water at a temperature T (Kelvin) and mass m?

1. $\frac{h}{\sqrt{mkT}}$

2. $\frac{h}{\sqrt{3mkT}}$

3. $\frac{2h}{\sqrt{3mkT}}$ 

4. $\frac{2h}{\sqrt{mkT}}$

Subtopic:  De-broglie Wavelength |
80%
From NCERT
NEET - 2017
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The de-Broglie wavelength of a particle accelerated by a 150 volt potential difference is 10-10 m. What will its wavelength be if it is accelerated by a 600 volt potential difference?

1. 0.25 $\stackrel{o}{A}$

2. 0.5 $\stackrel{o}{A}$

3. 1.5 $\stackrel{o}{A}$

4. 2 $\stackrel{o}{A}$

Subtopic:  De-broglie Wavelength |
77%
From NCERT
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A particle which has zero rest mass and non-zero energy and momentum must travel with a speed:

 1 Equal to c, the speed of light in vacuum. 2 Greater than c. 3 Less than c. 4 Tending to infinity.

Subtopic:  De-broglie Wavelength |
75%
From NCERT
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Electrons used in an electron microscope are accelerated by a voltage of 25 kV. If the voltage were increased to 100 kV, then the de-Broglie wavelength associated with the electrons would:
 1 decrease by 2 times 2 decrease by 4 times 3 increase by 4 times 4 increase by 2 times

Subtopic:  De-broglie Wavelength |
78%
From NCERT
AIPMT - 2011
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What will be the percentage change in the de-Broglie wavelength of the particle if the kinetic energy of the particle is increased to 16 times its previous value?
1. 25
2. 75
3. 60
4. 50

Subtopic:  De-broglie Wavelength |
69%
From NCERT
NEET - 2014
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An electron of mass m with an initial velocity $$\overrightarrow v= v_0\hat i$$$\stackrel{}{}$$$( v_o > 0 )$$ enters in an electric field $$\overrightarrow E = -E_0 \hat i$$$$(E_0 = \text{constant}>0)$$ at $$t=0$$. If $$\lambda_0$$${\mathrm{}}_{}$, is its de-Broglie wavelength initially, then what will be its de-Broglie wavelength at time $$t$$?
1. $$\frac{\lambda_0}{\left(1+ \frac{eE_0}{mv_0}t\right)}$$
2. $$\lambda_0\left(1+ \frac{eE_0}{mv_0}t\right)$$
3. $$\lambda_0 t$$
4. $$\lambda_0$$

Subtopic:  De-broglie Wavelength |
67%
From NCERT
NEET - 2018
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If alpha, beta and gamma rays carry the same momentum, which has the longest wavelength?

 1 Alpha rays 2 Beta rays 3 Gamma rays 4 None, all have same wavelength
Subtopic:  De-broglie Wavelength |
66%
From NCERT
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Waves are associated with matter only:

 1 When it is stationary. 2 When it is in motion with the velocity of light only. 3 When it is in motion with any velocity. 4 None of the above.

Subtopic:  De-broglie Wavelength |
57%
From NCERT
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