SLIDE PRESENTATION

GREESHMA G.

PHYSICAL SCIENCE

REG.NO.: 13982005

LIGHT PHENOMINAS

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

DISPERSION OF LIGHT

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

RAINBOW

NEWTON’S COLOUR DISC

PRIMARY COLOURS AND SECONDARY COLOURS

Primary colours Secondary colours

Green + Red Yellow

Green + Blue Cyan

Blue + Red Magenta

SCATTERING OF LIGHT

SUN RISE AND SUN SET

SUN RISE

SUN SET

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.

BLUENESS OF SKY

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.

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