Q19. The time taken by light to travel normally through a glass plate of thickness 1 mm would be:
(Take refractive index of glass = 1.5)
(a) 0.1 x 10⁻¹³s
(b) 12 x 10⁻⁵s
(c) 5 x 10⁻¹²s
(d) 1.5 x 10⁻⁵s

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Accepted Answer

5 x 10⁻¹²s

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Q19. The time taken by light to travel normally through a glass plate of thickness 1 mm would be: (Take refractive index of glass = 1.5) (a) 0.1 x 10⁻¹³s (b) 12 x 10⁻⁵s (c) 5 x 10⁻¹²s (d) 1.5 x 10⁻⁵s

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