The image seen through a theodolite appears upside down due to the use of a system of prisms and lenses in the instrument. These optical components invert the image as it passes through, a common feature in many optical devices. This inversion allows for precise measurements and alignment, as the user can easily correlate the view through the theodolite with the actual physical layout of the surveying area. Ultimately, this design helps maintain accuracy in reading angles and distances.
If it's both upside down and reversed from left to right, it would be equivalent to the image rotated 180 degrees.
concave
If the angles of the mirrors that you used on periscope are not parallel to each other you would see the image upside down.
Yes, when you look at something upside down, the image will be projected upside down onto your retina, located at the back of your eyeball. However, your brain is able to interpret the image and flip it right side up so that you perceive the object correctly.
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.
If it's both upside down and reversed from left to right, it would be equivalent to the image rotated 180 degrees.
it is convex
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.
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.
The word "NOON" is an example of an image that reads the same right side up and upside down.
convex lens
an enlarged, upside-down virual image.
it is upside down in the back of the eye and the brain corrects that.
If the angles of the mirrors that you used on periscope are not parallel to each other you would see the image upside down.
The inverted or upside-down image is formed on the retina.