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Light passes from substance A into substance B, and it bends as shown in the diagram.

Which of the following is accurate about the $n$ values of the two substances?


${ n }_{ A }>{ n }_{ B }$


${ n }_{ A }<{ n }_{ B }$


${ n }_{ A }={ n }_{ B }$


Nothing can be said for sure about n-values from the information in the diagram.

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