Virtual Image
A virtual image is an optical image formed from the apparent divergence of light rays from a point. It is formed when the light rays appear to diverge from a point behind a mirror or lens, as opposed to a real image, which is formed when the light rays converge at a specific point. Virtual images cannot be projected onto a screen, but they can be seen by the observer. They are often produced by convex mirrors and diverging lenses.
Characteristics of Virtual Images
- Cannot be projected onto a screen
- Appears to be located behind the mirror or lens
- Always upright and of the same size as the object
- Formed by the apparent intersection of light rays
Formation of Virtual Images
Virtual images are formed when the light rays diverge upon reflection from a mirror or refraction through a lens. This divergence gives the appearance of the light rays coming from a point behind the mirror or lens, resulting in the formation of a virtual image.
Examples of Virtual Images
Two common examples of virtual images are the image formed in a plane mirror and the image produced by a diverging lens. In both cases, the virtual image appears to be located behind the reflecting or refracting surface.
Study Guide
When studying virtual images, make sure to understand the following key points:
- The difference between virtual and real images
- How virtual images are formed by mirrors and lenses
- The characteristics of virtual images
- Examples of virtual images in everyday life
Practice drawing ray diagrams for virtual images formed by different types of mirrors and lenses. Additionally, work through problems that involve identifying the location and characteristics of virtual images in various optical systems.
Understanding virtual images is important in the field of optics and has practical applications in the design of optical instruments and systems.
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