| 1 |
The numerical value of Compton wavelength is equal to |
- A. 3.43 x 10<sup>-12</sup> m
- B. 1.43 x 10<sup>-12</sup>m
- C. 2.43 x 10<sup>-12</sup>m
- D. 0.43 x 10<sup>-12</sup>m
|
| 2 |
Energy of Black body radiation depends upon |
- A. Nature of surface of body
- B. Nature of material of body
- C. Shape and size of body
- D. Temperature of the body
|
| 3 |
In Compton scatting, the value of shift is equal to Compton's wavelength, when X-rays is scattered at the angle of. |
- A. 90<sup>o</sup>C
- B. Zero
- C. 120<sup>o</sup>C
- D. 45<sup>o</sup>C
|
| 4 |
The minimum energy required for occurrence of pair production is: |
- A. 1.022eV
- B. 1.02keV
- C. 1.02Me.V
- D. 1.04MeV
|
| 5 |
Antiparticle of electron is. |
- A. proton
- B. Photon
- C. Positron
- D. Neutron
|
| 6 |
<br> |
- A. Wien's constant
- B. Planck's constant
- C. Davison constant
- D. Lumber's constant
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| 7 |
The emission of electrons from metal surface when exposed to light is called: |
- A. Compton effect
- B. Pair production
- C. Photoelectric effect
- D. None of above
|
| 8 |
All motions are |
- A. Absolute
- B. Uniform
- C. Relative
- D. Variable
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| 9 |
Albert Einstein got noble prize for service in: |
- A. Pair production
- B. Annihilation of matter theory
- C. Compton effect
- D. Photoelectric effect
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| 10 |
When a very high energy modeules such as y radiation interact with matter, the phenomenon arising will be. |
- A. Photoelectric effect
- B. Compton effect
- C. Pair production
- D. Annihilation of matter
|