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.

1. SLIDE PRESENTATION
GREESHMA G.
PHYSICAL SCIENCE
REG.NO.: 13982005

2. LIGHT PHENOMINAS

3.  When light passes through a prism, the
refracted beam is travels towards the base
of the prism

4. DISPERSION OF LIGHT

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

9. NEWTON’S COLOUR DISC

10. PRIMARY COLOURS AND SECONDARY COLOURS

11. Primary colours Secondary colours
Green + Red Yellow
Green + Blue Cyan
Blue + Red Magenta

13. SCATTERING OF LIGHT

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