A prism ABC, with base BC, is placed in four | vedclass

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(A) When white light passes through a prism,it disperses into its constituent colours: Violet,Indigo,Blue,Green,Yellow,Orange,and Red $(VIBGYOR)$.In a

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$(i)$

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(A) When white light passes through a prism,it disperses into its constituent colours: Violet,Indigo,Blue,Green,Yellow,Orange,and Red $(VIBGYOR)$.In a standard prism orientation (where the base is at the bottom),the colours appear in the order $VIBGYOR$ from bottom to top.If the prism is inverted (base at the top),the order of colours from top to bottom is $VIBGYOR$.The third colour from the top in the inverted prism is Blue,which corresponds to the colour of the sky.In the given options,case $(i)$ shows the prism with the vertex $A$ at the bottom,which is an inverted orientation. Therefore,the third colour from the top will be Blue.

$A$ prism $ABC,$ with base $BC,$ is placed in four different orientations as shown. $A$ narrow beam of white light is incident on the prism as shown. In which of the following cases,after dispersion,the third colour from the top corresponds to the colour of the sky?

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