.......... obtained at angle of incidence equal to critical angle is called critical ray.a. Refracted ray b. Reflected ray c. Incident ray d. Partial refracted ray

Certainly, here's an example of a step-by-step solution for the problem of finding the reflected ray: **Problem:** Find the reflected ray when a light ray strikes a flat mirror. **Solution:** 1. Draw a diagram of the situation, showing the incident ray, the mirror, and the normal to the mirror at the point of incidence. \begin{center} \includegraphics[scale=0.5]{mirror.png} \end{center} 2. Label the angle of incidence (θi) and the angle of reflection (θr), which are equal according to the law of reflection. \begin{center} \includegraphics[scale=0.5]{mirror-labeled.png} \end{center} 3. Draw the reflected ray by extending a line from the point of incidence at an angle equal to the angle of reflection (θr) to the other side of the mirror. \begin{center} \includegraphics[scale=0.5]{mirror-reflected.png} \end{center} 4. Check your solution by verifying that the angle of incidence and the angle of reflection are equal. ${\theta }_i={\theta }_r$ 5. Finally, label the incident and reflected rays to complete the diagram. \begin{center} \includegraphics[scale=0.5]{mirror-labeled-rays.png} \end{center} Therefore, the solution is that the reflected ray is the line extending from the point of incidence at an angle equal to the angle of reflection (θr) to the other side of the mirror.