Fire puzzle Man trapped in a room

A man is trapped in a room.
The room has only two possible exits: two doors.
Through the first door there is a room constructed from magnifying glass.
The blazing hot sun instantly fries anything or anyone that enters.
Through the second door there is a fire-breathing dragon.
How does the man escape…?

 

 

SOLUTION

He waits until time and then goes through the first door.