When a soap film on the water is seen in the daytime, it shows beautiful colors. This phenomenon is due to
- Adiffraction of light
- Brefraction of light
- Cpolarization of light
- Dinterference of light
- ENone of the above/More than one of the above
Show answer and explanation
Correct answer: (d) interference of light
Explanation
Colours on a soap film arise from interference of light, where waves reflected off the front and back surfaces of the thin film superpose.
Path difference in the thin film causes some wavelengths to interfere constructively and others destructively, producing colours.
It is not refraction (rainbow) or dispersion; the effect needs two reflected wavefronts to combine.