Light and Colour

• Light can be reflected, refracted or absorbed by an object.
• When white light hits the surface of an object, it reflects off at different angles depending on its colour.
• The colour we see is determined by the wavelength of light that is reflected off an object
• White objects reflect all visible wavelengths of light equally well
• Black objects absorb most of the visible wavelengths of light
• The angle of incidence is equal to the angle of reflection.
• White light contains all visible wavelengths of light (red, orange, yellow, green, blue, indigo, violet).
• Colours are caused by the selective absorption of certain wavelengths of light by objects.
• Light is a wave that carries energy
• light travels in straight lines
• we see objects when light reflects off them into our eyes
• when lights reflects off a plane mirror, the aNile of indicence is equal to the angle of reflection
• light comes to a focus when it is reflected off a concave mirror
• light spreads out when it is reflected off a convex mirror
• speed of light is 200,000,000 m/s