Optics: Real vs Virtual Images

Real Image in Optics

• A real image is formed when light rays converge after reflecting off a surface or passing through a lens.
• This image appears in front of the optical device, meaning it can be projected onto a screen or surface.

Difference Between Real and Virtual Images

• Real images can be projected onto a screen, while virtual images cannot; virtual images appear to be located behind the mirror or lens.
• Real images are formed by the actual convergence of light rays whereas virtual images are formed by the apparent divergence of light rays.

Formation Location of Real Images

• A real image is located on the opposite side of the optical device from the object.
• The distance from the image to the lens or mirror varies based on the object's distance and the focal length of the device.

Inversion of Real Images

• Real images are typically inverted compared to the object.
• The inversion occurs when the object is positioned outside the focal length of a converging lens or a concave mirror.

Mirrors that Produce Real Images

• Concave mirrors can produce real images when the object is placed outside the focal point.
• Convex mirrors cannot produce real images; they always produce virtual images due to the way light diverges.