Write the nature of the image formed at the retina. How do we see the object upright ?

Answer

**Step-by-Step Text Solution:**

1. **Understanding the Retina**: The retina is a light-sensitive layer located at the back of the eye. It acts like a screen that captures the images formed by the lens of the eye.

2. **Nature of the Image Formed**: When light enters the eye, it passes through the cornea and the lens. The lens, which is a convex lens, focuses the light onto the retina. The image formed on the retina is real and inverted. This means that the image is upside down compared to the actual object.

3. **Reason for Inversion**: The reason the image is inverted is due to the properties of the convex lens. Convex lenses typically produce real and inverted images in most cases. Therefore, when the light rays converge on the retina, they create an inverted image.

4. **Seeing the Object Upright**: Although the image on the retina is inverted, we perceive the object as upright. This is because the brain processes the visual information it receives. The brain is capable of interpreting the inverted image and correcting it back to its upright position.

5. **Brain's Role**: The brain recognizes that the image formed on the retina is inverted and automatically flips it back to the correct orientation. This allows us to see the object as it truly is, maintaining the correct size and orientation.

**Final Summary**: The image formed at the retina is real and inverted due to the properties of the convex lens in the eye. However, we perceive the object as upright because our brain processes and corrects the inverted image.

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