Question:
2 A ray of light passes normally through a slab u 1 5 of
Last updated: 6/13/2023
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2 A ray of light passes normally through a slab u 1 5 of thickness 50 mm If speed of light in vacuum be 3 x 10 m s then time taken by the ray to cross the slab will be 1 250 ps 3 250 2 5 ps 4 5