An image seen through a simple telescope will be seen both reversed and inverted.
convex lens
Well when a word is shown in front of a mirror the reflection of the word upside down. This is called mirror image.
Because that is how the brain is organised. Once it is processed, the brain knows what way the image should be. While your eyes' lenses may create an inverted (upside down) image, the brain corrects this automatically, so there is no "upside-down" to be noticed.
Light hitting the lens the eye is refracted. Imagine a bunch of drinking straws tied at the middle. If you fan out the top the bottom of the straws will fan in the opposite direction. So it is with the light through a lens. The angle of incidence bends all the light through the centre of the lens and out of the back of the lens. As light always travels in straight lines through a medium, that which was at the bottom on the way in is at the top on the way out and that which was on the left finishes up on the right. Therefore the image is upside down.
because the spoon is concave, making the reflection upside down
An image that is upside down as compared to the object are known as inverted images. Example, the first thing you will notice is that the concave side of the spoon makes your image come upside down. Such an image is called an inverted image.
When the image hits the retina, it is upside down but our brain automatically converts it so it is flipped to become an upright image.
it is convex
If the angles of the mirrors that you used on periscope are not parallel to each other you would see the image upside down.
When the image reaches the eye, it is right-side up. The optics in your eye flip the image upside down in the process of absorbing the light. The up-side down image is then sent to your brain. You brain translates it back to right side up, and then creates the image for you to see. The image never appears upside down to you, because your brain does not create the image for you to see until it has flipped it back right-side up.
It is said to be inverted
concave
If you mean during printing and are referring to the projected image, it is upside down if you put the negative in the carrier the wrong way. The image should go upside down in the carrier so that it is projected right side up.
an enlarged, upside-down virual image.
convex lens
If it's both upside down and reversed from left to right, it would be equivalent to the image rotated 180 degrees.
it is upside down in the back of the eye and the brain corrects that.