Question

On a rainy day, if there is an oil drop on tar road, coloured rings are seen around this drop. This is because of.

• A. total internal reflection of light
• B. polarisation
• C. diffraction pattern
• D. interference pattern produced due to thin films

Answer 1

The correct option is D interference pattern produced due to thin films

When a thin layer of oil floats on the water level, interference takes place between ray of light reflected from upper interface and from lower interface. Due to interference coloured fringes are formed in oil film.