Mr. Viswanathan, a retired professor of physics was walking with his grandson. It was last week of December and so it was dark around 5.30 pm. The street lights were on and the yellow light flooded the area around. The boy asked professor why yellow lights were used when white light were brighter. The professor answered that during foggy days the tiny droplets act as prisms splitting the white light into its constituent colours and thus reducing the clarity.
(i) What phenomenon was the professor referring to ? Why does it happen ?
(ii) Give one application of prism.
(iii) What values of the boy reflect from the conversation.
