When a drop of oil is spread on a water surface, it displays beautiful colours in daylight because of:
| 1. | dispersion of light | 2. | reflection of light |
| 3. | polarization of light | 4. | interference of light |
Which of the following properties of light conclusively support the wave theory of light?
| (a) | Light obeys laws of reflection. |
| (b) | The speed of light in water is smaller than the speed in a vacuum. |
| (c) | Light shows interference. |
| (d) | Light shows the photoelectric effect. |
Choose the correct option from the given ones:
| 1. | (a) and (b) only |
| 2. | (b) and (c) only |
| 3. | (c) and (d) only |
| 4. | (a), (b), (c) and (d) |