3 years ago

Which is the best definition to describe a transfer of energy?

Physics

1 answer:

MissTica3 years ago

3 0

Answer:

Explanation:

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A plastic light pipe has an index of refraction of 1.48. For total internal reflection, what is the minimum angle of incidence i

Rama09 [41]

Answer:

a) 42.52°

b) 63.98°

Explanation:

Refractive index of pipe = 1.48 = n₂

Refractive index of air = 1.0003 = n₁

$\theta_r=sin^{-1}\frac{n_1}{n_2}\\\Rightarrow \theta_r=sin^{-1}\frac{1.0003}{1.48}\\\Rightarrow \theta_r=sin^{-1}0.676\\\Rightarrow \theta_r=42.52^{\circ}$

∴ Minimum angle of incidence is 42.52°

Refractive index of water = 1.33 = n₁

$\theta_r=sin^{-1}\frac{n_1}{n_2}\\\Rightarrow \theta_r=sin^{-1}\frac{1.33}{1.48}\\\Rightarrow \theta_r=sin^{-1}0.899\\\Rightarrow \theta_r=63.98^{\circ}$