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प्रश्न
A ray of light falls on a transparent sphere with centre C as shown in the figure. The ray emerges from the sphere parallel to the line AB. Find the angle of refraction at A if the refractive index of the material of the sphere is \[\sqrt{3}\].
उत्तर
From Snell's law, we have: \[\frac{\sin\left( i \right)}{\sin\left( r \right)} = \mu\] At A, i = 60° (given)
Now, μ = √3
\[\Rightarrow \sin\left( r \right) = \frac{\sin\left( i \right)}{\mu}\]
\[ \Rightarrow \sin\left( r \right) = \frac{\sin\left( 60° \right)}{\sqrt{3}} = \frac{1}{2}\]
\[ \Rightarrow r = \sin^{- 1} \left( \frac{1}{2} \right)\]
\[ \therefore r = 30°\]
संबंधित प्रश्न
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(i) electric field between the plates
(ii) capacitance, and
(iii) energy stored in the capacitor
Solve the following question.
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In a parallel plate capacitor, the capacity increases if ______.
A parallel plate capacitor is connected to a battery as shown in figure. Consider two situations:
- Key K is kept closed and plates of capacitors are moved apart using insulating handle.
- Key K is opened and plates of capacitors are moved apart using insulating handle.
Choose the correct option(s).
- In A: Q remains same but C changes.
- In B: V remains same but C changes.
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