A soap film is formed on a wire ring held vertically and allowed to drain. A diffuse source of while light is observed by reflection in the soap film . In this connection indicate the wrong statement :

A soap film is formed on a wire ring held vertically and allowed to dr

1.	A soap film is formed on a wire ring held vertically and allowed to drain. A diffuse source of while light is observed by reflection in the soap film . In this connection indicate the wrong statement :
Answer» The colours are due to refraction of light by the wedge-shaped film The thickness of the film is of the same order as the WAVELENGTH of visible light The band of colours move downwards as the film drains Just before the film breaks, it may appear black at the TOP Solution :First three statements are CORRECT. The fourth STATEMENT alone is wrong, the fringes are due to reflection and interference .

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A soap film is formed on a wire ring held vertically and allowed to drain. A diffuse source of while light is observed by reflection in the soap film . In this connection indicate the wrong statement :

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