V. For the following Question Nos. 23 to 25, a paragraph is given, You have to first go through that given paragraph and then answer the following three questions by indicating correct option. These questions carry two marks each : \( \quad 3 \times 2=6 \) Paragraph : In the figure light refraction is. shown at the airglass interface. When light travels from rarer to denser medium, the ray bends towards the normal with angle of refraction less than angle of incidence.
23. If angle of incidence is \( t>i \), then angle of refraction is
\( \begin{array}{llll}\text { 24. If angle of incidence is } t^{i}>2 & \text { (C) }<i & \text { then angle of refraction is }\end{array} \)
(A) \( 2 i \)
25. For what value of angle of incidence total internal reflection (TIR) takes place ?
(A) \( 90^{\circ} \)
(B) \( 48^{\circ} \)
(C) \( 30^{\circ} \)
(d) For no value.
