In the figure [a] the light is incident at an angle $${{\mu }_{k}}=1-\frac{1}{{{n}^{2}}}$$ (slightly greater than the critical angle). Now keeping the incident ray fixed a parallel slab of refractive index $${{n}_{3}}$$ is placed on surface AB.

Question

TuteeHUB · Accepted Answer

total reflection occurs at CD for $${{n}_{3}}<{{n}_{1}}$$.

TuteeHUB · Answer

total internal reflection occurs at AB for $${{n}_{3}}={{n}_{2}}$$

TuteeHUB · Answer

total internal reflection occurs at AB for $${{n}_{3}}>{{n}_{1}}$$

TuteeHUB · Answer

the ray will return back to the same medium for all values of $${{n}_{3}}$$

TuteeHUB · Answer

total reflection occurs at CD for \[{{n}_{3}}

1.	In the figure [a] the light is incident at an angle \[{{\mu }_{k}}=1-\frac{1}{{{n}^{2}}}\] (slightly greater than the critical angle). Now keeping the incident ray fixed a parallel slab of refractive index \[{{n}_{3}}\] is placed on surface AB.
A.	total internal reflection occurs at AB for \[{{n}_{3}}={{n}_{2}}\]
B.	total internal reflection occurs at AB for \[{{n}_{3}}>{{n}_{1}}\]
C.	the ray will return back to the same medium for all values of \[{{n}_{3}}\]
D.	total reflection occurs at CD for \[{{n}_{3}}<{{n}_{1}}\].
Answer» D. total reflection occurs at CD for \[{{n}_{3}}<{{n}_{1}}\].

In the figure [a] the light is incident at an angle \[{{\mu }_{k}}=1-\frac{1}{{{n}^{2}}}\] (slightly greater than the critical angle). Now keeping the incident ray fixed a parallel slab of refractive index \[{{n}_{3}}\] is placed on surface AB.

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