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The document is a slide presentation about light phenomena given by Greeshma G. for a physical science class. It discusses how light disperses when passing through a prism and is separated into the visible light spectrum. It also covers topics like rainbow formation, primary and secondary colors, scattering of light, reasons for the red colors of sunrise and sunset and the blueness of the sky.
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- 1. SLIDE PRESENTATION GREESHMA G. PHYSICAL SCIENCE REG.NO.: 13982005
- 3. When light passes through a prism, the refracted beam is travels towards the base of the prism
- 7. Light ray Wave length (nm) Violet 400 – 440 Indigo 440 – 460 Blue 460 – 500 Green 500 – 570 Yellow 570 – 590 Orange 590 – 620 Red 620 – 700
- 8. RAINBOW
- 10. PRIMARY COLOURS AND SECONDARY COLOURS
- 11. Primary colours Secondary colours Green + Red Yellow Green + Blue Cyan Blue + Red Magenta
- 14. SUN RISE AND SUN SET
- 15. SUN RISE
- 16. SUN SET
- 17. Red light has higher wavelength, so it travels more distance without scattering. Because of that we saw the sun is reddish in colour on the sun rise and sun set times.
- 18. BLUENESS OF SKY
- 19. Colours like violet, indigo, blue have lower wavelength are scattered more on the sky compared with other lights. This scattered lights spreads over the sky and as a result the sky is seen in the blue colour.
- 21. THANK YOU