Zusammenfassung der Ressource
Light
- Light carries energy
and travels in a
wave
- Speed of light - 300,000 km/s = 300,000,000 m/s
- White Light
- Red
- Orange
- Yellow
- Green
- Blue
- Indigo
- Violet
- Luminous and Non-Luminous
Anmerkungen:
- A luminous objects is one that is a source of light. A non-luminous object is one that reflects light from another source.
- Colour
Anmerkungen:
- How do we see colours? a coloured object will absorb all the colours of the spectrum apart from its own, and reflects that colour. So a green ball will reflect the green light and absorb all the rest of the colours. Black however, absorbs all the colours of the spectrum, so where you see a black object you are actually seeing an absence of light.
- Primary Colours
Red, Yellow, Blue
- Refraction
Anmerkungen:
- Refraction is when light is bent. when rays of light enter something more dense than air, they slow down and refract towards the normal line. this is why a pencil in water looks bent.