Plz and this question I will mark them as BRAIN

1.	Plz and this question I will mark them as BRAIN
Answer» ANSWER: (a) (i)Angle of incidence = 90-30 = 60° (ii)Angle of refraction = 90-45 = 45° (b) u(liq RELATIVE to air ) = √(3/2) EXPLANATION: (b) using Snell's LAW , u(air) x SIN(60°) = u(liq) x sin(45°) => u(liq)/u(air) = sin(60°)/sin(45°) => u(liq)/u(air) = √3/2 x √2 => u(liq relative to air) = √6/2 or √3/√2 or √(3/2) ...

Answer»

ANSWER:

(a)

(i)Angle of incidence = 90-30 = 60°

(ii)Angle of refraction = 90-45 = 45°

(b) u(liq RELATIVE to air ) = √(3/2)

EXPLANATION:

(b) using Snell's LAW ,

u(air) x SIN(60°) = u(liq) x sin(45°)

=> u(liq)/u(air) = sin(60°)/sin(45°)

=> u(liq)/u(air) = √3/2 x √2

=> u(liq relative to air) = √6/2 or √3/√2 or √(3/2) ...

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Plz and this question I will mark them as BRAIN