After reflection from the concave mirror, rays of light from the sun converges

A glass block of thickness 10cm is placed on an object. If an observer views the object vertically, the displacement of the object is

I. Rays of light travel from a less dense medium to a denser medium. II. The Angle of incidence is greater than critical angle. III. Rays of light travel from a denser medium to a less dense medium. Which of the statements above are conditions for total internal reflection to occur?

The use of lenses is Not applicable in the