A thin oil film on a water surface appears coloured because of –

Related MCQs

• Before X-ray examination (coloured X- ray) of the stomach, patients are given suitable salt of barium because.
• The information of brilliant colors in a thin soap film is a consequence of the phenomena of -
• On a clean glass plate a drop of water spreads to form a thin layer whereas a drop of mercury remains almost spherical because
• In sunlight, a rose appears red. In green light, the same rose appears –
• If a body weighs 12N on the surface of the earth, how much will it weigh on the surface of the moon where acceleration due to gravity is only one-sixth of that on earth's surface?
• A small drop of oil spreads over water because :
• Ail oil drop spreads over water because
• In mirrors the back surface is coated with a thin layer of
• The oil in the wick of an oil lamp rises up due to:
• A needle or a pin floats on the surface of water because of –