Formation of colours in a thin film of oil is due to:
Correct answer: C. Interference of light waves
- A. Diffraction of light waves
- B. Dispersion of light waves
- C. Interference of light waves
- D. Scattering of light waves
Explanation
The bright colors seen in an oil slick floating on water or in a sunlit soap bubble are caused by interference. This interference is between the light reflected from different surfaces of a thin film; thus, the effect is known as thin film interference.
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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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