JEE Advanced · Physics · 24. Ray Optics
A ray of light travelling in water is incident on its surface open to air. The angle of incidence is \(\theta\), which is less than the critical angle. Then there will be
- A only a reflected ray and no refracted ray
- B only a refracted ray and no reflected ray
- C a reflected ray and refracted ray and the angle between them would be less than \(180^{\circ}-2 \theta\)
- D a reflected ray and a refracted ray and the angle between them would be greater than \(180^{\circ}-2 \theta\)
Answer & Solution
Correct Answer
(C) a reflected ray and refracted ray and the angle between them would be less than \(180^{\circ}-2 \theta\)
Step-by-step Solution
Detailed explanation
Since \(\theta < \theta_c\), both reflection and refraction will take place. From the figure we can see that angle between reflected and refracted rays \(\alpha\) is less than \(180^{\circ}-2 \theta\).
\(\therefore\) Option (c) is correct.
\(\therefore\) Option (c) is correct.
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