Convex mirrors are curved mirrors that bulge outward. When parallel rays of light strike a convex mirror, they are reflected and converge at the focal point, which is located in front of the mirror. This convergence of light forms a virtual image that appears upright and diminished in size. The image appears behind the mirror, and it can be viewed by placing an eye in front of the mirror.
Convex lenses are curved lenses that bulge outward. When parallel rays of light strike a convex lens, they are refracted (bent) as they pass through the lens and converge at the focal point, which is located on the opposite side of the lens. This convergence of light forms a real image that appears upright and magnified in size. The image is formed on the same side of the lens as the object, and it can be projected onto a screen.
Magnifying glasses are convex lenses that are used to magnify small objects. When parallel rays of light strike a magnifying glass, they are refracted and converge at the focal point, which is located in front of the lens. This convergence of light forms a virtual image that appears upright and magnified in size. The image appears in front of the lens, and it can be viewed by placing an eye close to the lens.
In summary, upright images are formed by convex mirrors, convex lenses, and magnifying glasses. These optical devices produce images that appear right side up, as opposed to inverted images.