In a world where shadows can be solidified and locked in place by chanting a spell, Sunita casts a shadow with her outstretched arm upon a wall at sunset and then locks it into place with a spell. She tells Amir that he cannot touch the wall where her shadow lies. Assuming the shadow retains its form even as the sun moves, can Amir touch the wall after the sun has set and her shadow naturally disappears?

Provide a very brief response.
Yes, Amir can touch the wall after the sun has set. Even though Sunita's shadow was solidified and locked in place by the spell, this manipulation only affects the shadow during the time it naturally exists, which is when the light source (the sun) is casting it. After sunset, the light source no longer casts her shadow on the wall, and the magical solidification would have no object to maintain. Since the spell was specific to her shadow and not to the wall itself, there is no longer a solid shadow preventing Amir from touching the wall.