Physics

Eye Anatomy

Pupil: the pupil is where light enters

Iris: it contains muscles and changes the size of the pupil

Lens: focuses the light entering the eye

Retina: receives light that the lens has focuses and converts the light into neutral signs

Cornea: outside part that protect the outside of the eye

Optic nerve: Carrys the messages to the brain

Transparent: let's most light through

Translucent: only let's some through

Opaque: no light can pass through

How Shadows are created

Shadows are created when an Opaque object block out light rays and create a dark area where light rays don't reach

Light rays travel for straight lines

Whats a concave mirror ?

Concave mirror reflects inwards towards a point called the focal point and as the rays get closer and meet they are called converging rays

Whats a convex mirror

Convex mirrors reflect light outwards and the focal point of a convex mirror is behind the mirror, as the rays separate we call them diverging rays

The law of reflection

The law of reflection is that the angle of incident and the angle of reflect are always the same

Refraction

Refraction is the bending of light as it passes through one substance that is transparent to another one

Visible light spectrum

Red,orange,yellow,green,blue,indigo,violet

Violet has the highest energy

Red has the least amount of energy

Filters

Filter substract or absorb different colors of light

A Red filter blocks out all colors but red and yellow filter blocks blocks all colors but yellow

Electromagnetic spectrum

Radiation

Electromagnetic Radiation is why light forms a energy

All Radiation consists of electromagnetic and light is one of them

Radio waves are normally super low but are also useful with things like TV, wifi and radio

Microwaves

microwaves contain lows energy but are useful when it comes to cooking and contain long wave lengths

Infrared

Infrared have and use longer wave lengths from (700mm to 1mm) And posses lower frequencies and lower energy than visable light

X-rays

Xray have high energy and can see through skin and reveals images of bones

Gamma rays

Gamma rays have higher energy than x-rays

Ultra Violet

Ultra violet have high energy are harmful to humans cause sun burns and is used to sterile to equipment

Ultra violet : UVC,UVB,UVAC are high energy