Science Class 10
The Human Eye and the Colourful World
The eye as a lens, how spectacles fix it, and why the sky is blue.
11 lessons · ~81 min total
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Lessons in this topic
- 0 Start here The eye as a lens and a screen. How spectacles fix it. Why the sky is blue. · 4 min You are here
- 1 The eye is a lens instrument Light enters through the cornea. The lens forms an image on the retina. · 8 min
- 2 Focusing near and far The eye lens changes shape to focus. The nearest sharp distance is about 25 cm. · 8 min
- 3 When the image lands short In myopia, far objects focus in front of the retina. A concave lens fixes it. · 9 min
- 4 When the image lands far In hypermetropia, near objects focus behind the retina. A convex lens fixes it. · 9 min
- 5 The eye with age With age, the near point moves away. A convex lens helps with reading. · 8 min
- 6 Light comes apart A prism splits white light into seven colours. Violet bends the most. · 8 min
- 7 Why the sky is blue Air scatters blue light more than red. So the clear sky looks blue. · 8 min
- 8 The Sun at the edge of the day Near the horizon, sunlight crosses more air, so the Sun looks red. · 8 min
- 9 The big picture The whole chapter on one screen. · 3 min
- 10 Track quiz The rules first, then one short question on each. · 8 min
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