Light

300,000 km per second

light is made up of particles called photons that travel in waves

luminous objects release light on their own. e.g torch, laser, light bulb

objects that release light because they are hot. e.g sun, flames and lava

objects that release light without getting hot. e.g glow worms, fire flies and glow sticks

when light passs through the objects. e.g air, glass and water

when light bounces off the object. e.g mirror, foil, jewellery

when light is taken into the object. e.g table, paper and chair

when light is reflected from a flat, smooth surface, it bounces away from the surface at the same angle from which it came from.

the bending of light as it passes from one material to another

a measure of how light bends as it passes from one substance to another- change in speed

when it enters a new medium at 90 degrees to the surface.

the splitting of white light into colours

violet and blue slowed more and experience more bending than orange and red

The cornea bends light into the lens and lies in front of the iris. It is clear

A muscle controlling how much light enters the eye suspended in between the cornea and lens. Comes in many colours.

A dark circle in the centre of the iris. A hole that lets light into inner eye. They are round.

A flexible structure that enables light to be focused on the retina

A clear, watery fluid produced by the ciliary body that lies between cornea and lens. It lubricates the cornea and lens.

It is connected to the lens and the ciliary muscle changes the shape of the lens.

A clear fluid between the lens and retina

The white of the eye

Absorbs the light rays and turns them into electrical signals

Carries the electrical signals from the retina into the brain