Eyes

Question 1

What does the iris do

Answer 1

Makes the pupil larger or smaller depending on the amount of light

Question 2

Cornea

Answer 2

Focus light on the retina

Question 3

The hole in the eye
Transparent part where light enters or let’s light through

Answer 3

Pupil

Question 4

Lens

Answer 4

Part of of focusing process
Muscles around make it thicker or thinner depending on what your looking at

Question 5

Retina

Answer 5

Where the image is formed.Has millions of light sensitive cones(rods and cones)

Question 6

Sends the image to the brain(electronically)

Answer 6

Optic nerve

Question 7

What is the blind spot and

Answer 7

When the image of the retina is also on top of the optic nerve.This point is soo dense with eye nerves that there is no room for light sensitive cells

Question 8

Why do we see a white circle in between 2 black ones

Answer 8

Because are brain treats the black like night vision and is very sensitive.Are eyes look at the white and it is over sensitive and keep sending messages to our brain therefore we ‘see’ a white circle

Question 9

Why can we sometimes see the word and not others

Answer 9

Because we look at the black we can’t see it
We look at white we can see the letters

Question 10

Tag

Answer 10

Towards air glass

Question 11

Aga

Answer 11

Air glass air

Question 12

What happens when the ray enters the glass at 90

Answer 12

Travels straight through

Question 13

What happens if the ray goes in at a different angle

Answer 13

It bends changes direction

Question 14

What happens when a different angle comes out

Answer 14

Bends back to original angle

Question 15

What is the connection between the ray entering and leaving

Answer 15

They are parllel

Question 16

Refraction

Answer 16

When a wave moves through one medium to a different medium and changes speed

Question 17

TAG =

Answer 17

slows down

Question 18

Glass to air

Answer 18

Speeds up

Question 19

Air to glass

Answer 19

Slows down

Question 20

Light will not ——- when entêteront a different material at 90

Answer 20

Bend

Question 21

What animal needs to understand refraction. To live

Answer 21

Archer fish

Question 22

When rays pass through convex lens they

Answer 22

Converge

Question 23

This converge is called a

Answer 23

Converging lens

Question 24

What is the point where to the two lines meet called

Answer 24

Principal focus

Question 25

When parallel rays pass through a line they

Answer 25

Diverge

Question 26

This lens is known as a

Answer 26

Diverging lens

Question 27

What two things happen when you look through a convex lens

Answer 27

Upside down Back to front

Question 28

Is an image through a convex lens clear

Answer 28

No blurry and confusing

Question 29

Light from the top of eye focuses on

Answer 29

Bottom of retina

Question 30

Light from bottom of image

Answer 30

Focuses on top of retina

Question 31

What does the brain do to the image

Answer 31

Flip it

Question 32

Converging

Answer 32

Cross lines

Question 33

Diverging

Answer 33

Out wide lines

Question 34

Light is a mixture of

Answer 34

Many different colours

Question 35

The colours can be split into the

Answer 35

Spectrum

Question 36

Using a what can light be split

Answer 36

A prism

Question 37

Light refracts when entering a glass prism an spreads out In the colours of the spectrum when leaving this is called

Answer 37

Dispersion

Question 38

What is the colour spectrum

Answer 38

Red. (Richard of York gave battle in vain) Yellow Orange Green Blue Indigo Violet

Question 39

Real life example of dispersion

Answer 39

Rainbow

Question 40

What is the electro magnetic spectrum

Answer 40

Sèvrerai types of radiation waves

Question 41

Write the 7 types of radiation

Answer 41

Gamma rays X-rays UV rays Visible rays Infrared rays Microwaves Radio waves

Question 42

Which type has longest wave length

Answer 42

Radio

Question 43

What type is size of atom

Answer 43

Gamma

Question 44

Relationship between wavelength and energy

Answer 44

Lower wave higher energy

Question 45

Gamma

Answer 45

Sterilise fruit and veg and medical equipment Can damage cells and cause camcer

Question 46

X-ray

Answer 46

Bone X-rays,security at airport,X-ray metals for cracks Damage cells and cause camcer

Question 47

UV

Answer 47

Tan beds check bank notes sterilising Cause cancer and damage cells

Question 48

Visible light

Answer 48

Light bulbs,to screen,sun,photography Overexposure can damage the retina

Question 49

Infrared

Answer 49

Might vision goggles,fire heaters,toasters.Tv remotes Burns skin

Question 50

Microwave

Answer 50

Cooks food mobile phones satellites Can heat tissue at specific frequency

Question 51

Radio

Answer 51

Radio,some satellites No dabger

Question 52

Transverse wave

Answer 52

Vibration of particles are perpendicular to the direction of energy

Question 53

Travels at

Answer 53

300,000,000m/s vacuum space

Question 54

How do we see

Answer 54

Light Travel through the air Iris control size, of pupil and amount of light let in The light through the pupil The light rays are bent(refracted)by the lens Cornea bends(refracts) light rays is the enter the eye The Image is focused on the retina which contains light receptor cells The optic nerve carries the electrical impulse from the eye to the brain.

Question 55

FAST

Answer 55

Faster away (the normal) Slower towards