Sir, 1) A man 2 meters tall stands 5 meters in front of a large vertical plane mirror. What is the angle subtended by his image in the mirror at his eye? I solved it in the following way: Let AB represent the man and CE represent the mirror mounted on the wall.Here I am assuming that the level of eyes and head are almost the same. From the figure, Tan(y) = 2/5 y = 0.38 radians Is it right? 2) A convergent beam of light converges to a point 20 cm behind the convex mirror on the principal axis. An inverted image of the same size coincident with the virtual object is formed. What is the focal length of the convex mirror? I didn’t understand this question. Here it is said that an inverted image is formed coincident with the virtual object. But since the image is inverted, it should be real image. At the same time, since the image is coincident with the virtual object, the image also should be virtual isn’t it? How can an image be real as well as virtual? I think the question is wrong. What do you say Sir?