Colors of thin film result from
Correct answer: B. Interference of light
- A. Dispersion
- B. Interference of light
- C. Absorption of light
- D. Scattering of light
Explanation
Multiple colors are observed on the oil floating on water due to the phenomenon of interference. The light falling on the different surfaces of the film gets reflected and undergoes constructive interference producing multiple colors. Interference depends on the thickness of the film.
This question appeared on the ETEA MDCAT 2015 paper, which you can sit online with every answer explained.
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About Optics
Light is studied through reflection, refraction, dispersion, interference, diffraction and polarization, linking ray behavior with its wave nature. Questions may involve mirrors, lenses, optical instruments, refractive index and image formation, while geometrical optics deals with rays and wave optics explains effects such as interference and diffraction.
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