The figure below shows a lens treated as a combination of two prisms and a glass block. $(i)$ Name the lens formed by the combination. $(ii)$ Is the lens converging or diverging? $(iii)$ Draw the refraction of two incident rays to illustrate the property of the lens mentioned by you in part $(ii).$

(N/A) $(i)$ The lens formed by the combination is a concave lens.
$(ii)$ The lens is a diverging lens.
$(iii)$ $A$ concave lens causes parallel rays of light to diverge after refraction. The rays appear to originate from a single point on the principal axis,known as the principal focus. This is illustrated in the provided diagram.