| 1 |
A ray of light shows the direction of propagation of light It is line which is. |
- A. Normal to the wave front
- B. Parallax to the wave front
- C. Opposite to the wave front
- D. Equal to the wave front
|
| 2 |
An oil film on water surface shows colour due to. |
- A. Diffraction
- B. Interference
- C. Polarization
- D. Dispersion
|
| 3 |
The centre of Newton's rings will be |
- A. Dark
- B. Bright
- C. Coloured
- D. Not visible
|
| 4 |
Hygen's principle is used for. |
- A. Explain polarization
- B. Locate the wave front
- C. Find the speed of light
- D. Find the index of refraction
|
| 5 |
The fringe spacing increases if we use. |
- A. Yellow light
- B. Green lgiht
- C. Blue light
- D. Red light
|
| 6 |
Which is nooptically active |
- A. Sugar
- B. Tartaric acid
- C. Water
- D. Sodium chloride
|
| 7 |
According to Huygen's principle the points on primary wave front can be considered as |
- A. Secondary wavelets
- B. Ray of light
- C. Source of light
- D. None of these
|
| 8 |
In case of point source the shape of wave front is. |
- A. Plane
- B. spherical
- C. Circular
- D. Eliptical
|
| 9 |
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
|
| 10 |
Bending of light around the edges of an obstacle is called. |
- A. Refraction
- B. Polarization
- C. Interference
- D. Diffraction
|