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# Real and Virtual Images **Real images** are images where light rays actually converge | Image Formed | Lens Used | Mirror | |---|---|---| | Inverted | Converging Lens | Concave mirror | **Virtual images** are locations where light rays appear to have converged | Feature | | |---|---| | Uprig...

# Real and Virtual Images **Real images** are images where light rays actually converge | Image Formed | Lens Used | Mirror | |---|---|---| | Inverted | Converging Lens | Concave mirror | **Virtual images** are locations where light rays appear to have converged | Feature | | |---|---| | Upright | | | | Diverging Lens | | | Convex, Concave and Plane Mirror | # Activity 16.8 To observe the image formed by a concave lens. **Materials required:** * A concave lens * A matchbox * A white sheet of paper **Procedure:** Repeat the previous activity, but use a concave lens instead and record your observations **Observation:** The image formed by a concave lens is virtual, erect and diminished. # Let us revise The given statements are: 1. An image formed on a screen is called a virtual image. 2. A concave lens gives virtual images. 3. Convex lens can converge light. 4. Concave lenses are thicker at the centre. # Image Formation in the Eye The human eye has an inbuilt convex lens. A real and inverted image is focused on the retina, which acts like a screen for the light rays entering the eye lens. The surface of the retina comprises photoreceptors, namely cones and rods. They get stimulated when light falls and send off electric signals. These signals are sent to the brain via the optic nerves. The brain interprets these signals. This allows us to see objects.