[" (59) Light wave enters from medium "1...

[" (59) Light wave enters from medium "1" to medium "2." Its "],[" velocity in "2" nd medium is double from "1^(" st ")" .For total "],[" internal reflection the angle of incidence must be greater "],[" than "],[[" (a) "30^(@)," (b) "60^(@)],[" (c) "45^(@)," (d) "90^(@)]]

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[" (59) Light wave enters from medium "1" to medium "2." Its "],[" velocity in "2" nd medium is double from "1^(" st ")" .For total "],[" internal reflection the angle of incidence must be greater "],[" than "],[[" (a) "30^(@)," (b) "60^(@)],[" (c) "45^(@)," (d) "90^(@)]]

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