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. | \(2.2 \times 10^{-52} \mathrm{~kg}-\mathrm{m} / \mathrm{sec}\) |
Which of the following figures represents the variation of the particle momentum and the associated de-Broglie wavelength?
1. | 2. | ||
3. | 4. |
What is the de-Broglie wavelength of a neutron in thermal equilibrium with heavy water at a temperature T (Kelvin) and mass m?
1.
2.
3.
4.
The de-Broglie wavelength of an electron is the same as that of a photon of wavelength λ. If the mass of an electron is m, then its kinetic energy will be:
1.
2.
3.
4.
1. | decrease by 2 times |
2. | decrease by 4 times |
3. | increase by 4 times |
4. | increase by 2 times |
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
2. 0.5
3. 1.5
4. 2
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. |
What is the de-Broglie wavelength associated with an electron accelerated through a voltage of 900 V?
1.
2.
3.
4.
The de-Broglie wavelength of a particle moving with a velocity m/s is equal to the wavelength of the photon. What is the ratio of the kinetic energy of the particle to the energy of the photon? (velocity of light is m/s)
1. | 1/8 | 2. | 3/8 |
3. | 5/8 | 4. | 7/8 |
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