| 1 |
The fringe spacing in a double slit experiment can be increased by decreasing. |
- A. Wavelength of light
- B. Width of slits
- C. Slit separation
- D. Distance between the slits and the screen
|
| 2 |
Dark fringes are also called as |
- A. Minima
- B. Maxima
- C. Wave front
- D. Ray of light
|
| 3 |
Oil film floating on water exhibits colours due to |
- A. Interference
- B. Diffraction
- C. Polarization
- D. All of these
|
| 4 |
Intensity of light depend on |
- A. Wave length
- B. Amplitude
- C. Velocity
- D. Frequency
|
| 5 |
The wavelength of X-rays is of the order of. |
- A. 10<sup>-8</sup> m
- B. 10<sup>-10</sup>m
- C. 10<sup>-5</sup>m
- D. 10<sup>-4</sup>m
|
| 6 |
The centre of Newton's rings will be |
- A. Dark
- B. Bright
- C. Coloured
- D. Not visible
|
| 7 |
Huygen's proposed, light energy travels in space from source in |
- A. 1578
- B. 1678
- C. 1778
- D. 1868
|
| 8 |
Light waves emitted from a source spread in |
- A. Specific direction
- B. All direction
- C. Upward direction
- D. None of these
|
| 9 |
In case of point source the shape of wave front is. |
- A. Plane
- B. spherical
- C. Circular
- D. Eliptical
|
| 10 |
The Bragg's equation is given by |
|