I was surprised by his solemn attitude.

He described the scenery in detail.

His description is very detailed, making you feel as if you are there.

He admitted his blunder on the issue.

A new ordinance was enacted by the decision of the prefectural assembly.

His eyes were filled with deep sorrow.

He stays up late every night and has trouble getting up early in the morning.

He stayed up late to study for the exam.

Invisible light rays are not visible to the human eye.

I think that's impossible.