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Cross-section view of a prism is the equilateral triangle ABC in the figure. The minimum deviation is observed using this prism when the angle of incidence is equal to the prism angle. The time taken by light to travel from P (midpoint of BC) to A is_______× 10-10s. (Given, speed of light in vacuum = 3 × 108 m/s and  cos30° =   3 2 )

0 4 Views | Posted 2 months ago
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    Answered by

    Vishal Baghel | Contributor-Level 10

    2 months ago

    from given information : I = A = 60°, r = A 2 = 3 0 ° =>  μ = 3 = c v

    ⇒ v = c 3 ⇒ t i m e     = ( 5 3 1 0 0 ) ( 3 × 1 0 8 3 ) = 5 × 1 0 − 1 0 s

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