Week 7- light

Light which is generated enables us to see.

The most common sources of this light would be the sun or a light bulb

Light can reflect off of surfaces and can travel through most mediums. An example of this is the glass of a lightbulb or water in a swimming pool.

When light travels through different mediums it ‘bends’ creating a change in the way we view light.

Light bounces off of mediums, for example, a mirror. This allows objects such as the sun to reflect into our houses and allow light to travel virtually everywhere.

The speed of light is around 300,000,000 m/s

This is the fastest thing in the known universe.

Light is Electromagnetic Radiation

There are two aspects to colour- Pigment and Wavelength

Pigment is an aspect of the object we're talking about when we ask "what color is it?"

Wavelength is an aspect of light, which is made up of different wavelengths.

White light contains all the possible wavelengths.

Black light contains none.

When light hits pigment, some of these wavelengths are absorbed and some are reflected.
A black pigment absorbs all the wavelengths

When something looks blue, it is because wavelengths in the blue spectrum of light are being reflected.

Things look different in different lights because not all light is white light. Something will look different under a light bulb than under sunlight.