Answer:
Step-by-step explanation:
Let the angle of refraction be θ .
sin 50 / sinθ = μ₂ /μ₁ , μ₂ is index of refraction of liver which is 1.2 times μ₁ .
sin 50 / sinθ = 1.2
sinθ = sin 50 / 1.2
= .6384
θ = 40°
If we take d is depth of tumer in the lever
d is base of the triangle within tumer , 1.2 / 2 = .6 cm is the perpendicular with respect to angle of refraction of 40° .
.6 / d = tan 40
d = .6 / tan40
= .715 cm .