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seb

there are 2 different types of lenses, what are they?

convex and concave

what focuses light when entering the eye?

lens

what is the transparent outer part of your eye

cornea

what changes size to adjust the amount of light?

pupil

what is the muscle that controls the size of the pupil?

iris

what sends electrical impulsesfrom eye to the brain?

optic nerve

what is the photosensitive layer at the back of the eye?

retina

what is the hard structure forming the outside of the eye?

sclera

give a definition of a luminous object

objects that give out light

give a definition of a non luminous object

objects that dont give out light

how is sound formed?

sound comes from vibration

give an example on how sound can be made

a guitar being plucked

what is frequency?

the number of waves each second

how is frequency mesured

frequency is mesured in hertz (hz)

complete the sentence the bigger the amplitude the

louder the sound

complete the sentence the smaller the amplitude the

quieter the sound

what are the primary colours of light?

red, green, blue

what are the secondary colours of light?

magenta, cyan, yellow

what are the 2 different types of circuits

series and parralel

how do you calculate resistance?

resistance=potential difference/current

what is static electricity?

static is a build up of electrical charge

how does static electricty occur?

electrons are transfired fro one material to another

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