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
Subtopic:  Superposition Principle |
 58%
Level 3: 35%-60%
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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)
Subtopic:  Superposition Principle |
 59%
Level 3: 35%-60%
Hints