the refrective index of glassa is 1.5. the velocity of light in vacune is C. The velocity of light in glass
3/2C
C
C/2
2/3C
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refractive index=speed of light in vacuum /medium
so... 1.5=C/X
that gives X=2/3C so answer is 2/3C
so... 1.5=C/X
that gives X=2/3C so answer is 2/3C
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