The optical path of a monochromatic ligh...

The optical path of a monochromatic light is the same if it goes through 2.00 cm of glass or x cm of ruby. If the refractive index of glass is 1.510 and that of rby is 1.760 find the value of x.

1.716 cm

1.525 cm

2.716 cm

2.525 cm

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