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The World of Colours and Vision
Physics · Kerala SSLC (Class 10) · English Medium · 38 questions and answers
Sample questions
- Q: Which part of the eye acts like a convex lens?
- A: The eye lens (crystalline lens) acts like a convex lens. It refracts light and focuses it on the retina to form a clear image.
- Q: What is the function of the retina?
- A: The retina is the light-sensitive screen at the back of the eye on which the image is formed. It contains cells that convert light into electrical signals sent to the brain through the optic nerve.
- Q: What is the power of accommodation of the eye?
- A: It is the ability of the eye lens to change its focal length by adjusting its curvature, so that objects at different distances can be focused clearly on the retina.
- Q: What is the least distance of distinct vision for a normal eye?
- A: The least distance of distinct vision is the closest distance at which the eye can see an object clearly without strain. For a normal adult eye it is about 25 cm.
- Q: What is myopia (short-sightedness)?
- A: Myopia is a defect in which a person can see nearby objects clearly but cannot see distant objects clearly, because the image of a distant object forms in front of the retina.
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