In a concave mirror, if an object is located between the center of curvature and the focal point, what is the best way to describe the image formed?

real, inverted, and the same size as the object

real, inverted, and larger than the object

light rays travel parallel to each other, no image formed

real, inverted, and smaller than the object

Asheet of steel 1.5 mm thick has nitrogen atmospheres on both sides at 1200oc and is permitted to achieve a steady-state diffusion condition. the diffusion coefficient for nitrogen in steel at this temperature is 6 x 10- 11 m2 /s, and the diffusion flux is found to be 1.2 x 10-7 kg/m2 -s. also, it is known that the concentration of nitrogen in the steel at the high-pressure surface is 4 kg/m3 . how far into the sheet from this high-pressure side will the concentration be 2.0 kg/m3 ? assume a linear concentration profile.