| 1 |
Which is not true for X rays |
- A. X rays are not defected by electric field
- B. X rays are polarized
- C. X rays consist of electromagnetic waves
- D. X rays can be diffracted by grating
|
| 2 |
The value of Rydberg constant is |
- A. 1.0974 x 10<sup>7</sup> m<sup>-1</sup>
- B. 1.0974 x 10<sup>-7</sup> m<sup>-1</sup>
- C. 1.0974 x 10<sup>6</sup> m<sup>-1</sup>
- D. 1.0974 x 10<sup>-6</sup> m<sup>-1</sup>
|
| 3 |
The 1<sup>st</sup> Bohr atom in the hydrogen atom has radius |
- A. 3.56 x 10<sup>-10</sup> m
- B. 0.053 x 10<sup>-11</sup> m
- C. 0.53 x 10<sup>-11</sup> m
- D. 5.30 x 10<sup>-11</sup> m
|
| 4 |
_____ has the largest de Broglie wavelength at same speed. |
- A. Proton
- B. Alpha particle
- C. Carbon atom
- D. Electron
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| 5 |
Target material used in x-rays tube have following properties. |
- A. High atomic number and high melting pouint
- B. High atomic number and low melting pouint
- C. Low atomic number and low melting pouint
- D. High atomic number only
|
| 6 |
In Helium Neon laser, discharge tube is filled with Neon gas. |
- A. 10%
- B. 15%
- C. 85%
- D. 90%
|
| 7 |
Production of x rays is reverse process of |
- A. Photo electric effect
- B. Compton effect
- C. An nihilation
- D. Pair production
|
| 8 |
Hydrogen atom spectrum does not lie in |
- A. Ultraviolet region
- B. Visible region
- C. Infrared region
- D. X ray region
|
| 9 |
Photons emitted in inner shell transition are. |
- A. Continuous X -rays
- B. Discontinuous X rays
- C. Characteristic X rays
- D. Energetic X rays
|
| 10 |
The series in infrared region is: |
- A. Paschen series
- B. Bracket series
- C. Pfund series
- D. All of above
|
