If VB, VG , VR be the velocity of blue ...

If `V_B, V_G , V_R ` be the velocity of blue , green and red light respectively in a glass prism, then which of the following statement gives, the correct relation ?

`V_(B)=V_(G)=V_(R)`

`V_(B) gt V_(G) gt V_(R)`

`V_(B) lt V_(G) lt V_(R)`

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