2D refers to objects or images that show only two dimensions; 3D refers to those that show three dimensions. Because reality exists in three physical dimensions, 2D objects do not exist. However, they can be portrayed in images and art.Continue Reading
2D and 3D generally refer to paintings, drawings and computer-generated images. While nothing real truly lacks a third dimensions, items can be depicted without showing a third dimension. The terms are sometimes used to determine whether a depiction of something is presented with clear signs of a third dimension. A drawing with a shadow, for example, might be said to be in 3D.
However, the term is sometimes used to refer to the medium of the depiction. Paintings, photographs and computer images are in 2D by this definition, regardless of what they depict. Sculptures, on the other hand, are in 3D. This distinction is common in the art world.
Further complicating matters are 3D films and drawings. By sending different images to each of the eyes of the viewer, images can simulate the third dimension. These depictions can be accurate, and the effect is enough to fool the brain. However, the depth dimension is only simulated, so some claim that these images are still 2D.Learn more about Particle Physics
Optical illusions work because humans have binocular vision, which allows people to see different objects with each eye and sometimes the images do not merge properly. The brain must also interpret the signals correctly. Persistence of vision can also make optical illusions work.Full Answer >
In microscopy, magnification refers to the enlargement of the object being studied, while resolving power pertains to the capacity of an optical medium, such as a lens, to distinguish between proximate objects as distinct images. The quality and usefulness of a microscope rely more on resolving power rather than on magnification.Full Answer >
Sprites are static or animated bitmap images often found as user interface icons, 2D objects in video games and small website images. Most popular in the 1980s and 1990s as for representing characters and objects in video games, they have now been replaced mostly by the 3D polygon.Full Answer >
Since the 1st century when Romans experimented with magnifying small objects by looking at them through glass, the microscope has changed considerably with modern versions of the device capable of presenting three-dimensional images of objects at the sub-atomic level. The most notable advances in microscope technology occurred in the 19th century.Full Answer >