Luminous objects: Objects like the sun that give out or emit light of their own are called luminous objects.
Opaque object: If we cannot see through an object at all, it is an opaque object.
Transparent: If it is possible to see clearly through an object than it is transparent.
Translucent: The objects through which we can see, but not very not very clearly. Such objects are known as translucent.
While looking into the mirror we see our own face inside the mirror. This is a reflection of your face in the mirror.
A mirror changes the direction of light that falls on it. The light travelling along straight lines and getting reflected from a mirror