A boy looks at the image of an object in a plane mirror. He observes two images, a main bright one and the other faint. The observed images result from?

An object is placed 10cm from a converging lens of foal length 15cm. Calculate the magnification of the image formed

An object is placed in front of a concave mirror whose radius of curvature is 12cm. If the magnification of the Image produced is 1.5, how far is the object from the mirror?

The image of an object is located 6cm behind a convex mirror. If it's magnification is 0.6, calculate the focal length of the mirror

The diagram above illustrates a beam of parallel rays from a distant object O, incident on one side of the total reflecting prism. Which diagram does not represent the correct path of the beam when it emerges from the prism?