Real image

Real image

Real image

A real image is a type of image that is formed when light rays converge and pass through the image location. Unlike a virtual image, which cannot be projected onto a screen, a real image can be displayed on a physical surface. Real images are typically formed by optical devices such as lenses and mirrors.

Formation of Real Images

Real images are created when light rays from an object converge after passing through an optical system. This convergence can occur through various means, such as refraction through a convex lens or reflection from a concave mirror. The point where the light rays meet is known as the focal point, and the image formed at this point is inverted relative to the object.

Characteristics of Real Images

• **Inverted**: Real images are typically upside down compared to the original object.
• **Projectable**: Since the light rays physically converge, real images can be projected onto a screen or surface.
• **Size**: The size of a real image can vary depending on the distance between the object and the optical device, as well as the focal length of the device.

Examples of Real Images

• **Cameras**: In a camera, a real image is formed on the film or digital sensor.
• **Human Eye**: The human eye forms a real image on the retina.
• **Projectors**: Devices like overhead projectors and movie projectors create real images on screens.

Applications

Real images have numerous applications in various fields:

• **Photography**: Cameras use lenses to form real images on photographic film or digital sensors.
• **Vision**: The human eye relies on the formation of real images on the retina to perceive the world.
• **Projection**: Projectors create real images on screens for presentations and entertainment.

Related Pages

• Virtual image
• Lens (optics)
• Mirror
• Focal point
• Optical system
• Camera
• Human eye