A ray of light AO is vacuum is incident on a glass slab at angle `60^@` and refracted at angle `30^@` along OB as shown in the figure.The optical path light ray from A to B is :
A
`(2sqrt3)/a+2b`
B
`2a+(2b)/3`
C
`2a+(2b)/sqrt3`
D
`2a+2b`
Text Solution
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The correct Answer is:
C
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