Science: Eye, Light, Colour

Question 1

What is a Convex Mirror?

Answer 1

When curved mirrors have a reflective surface that bulge outwards to the light-source. it has a large viewing point, makes the image smaller, and keeps the image upright. When parallel lines hit the mirror they reflect outwards and meet behind the mirror. that is the focus.

Question 2

What is a Concave Mirror?

Answer 2

A Concave mirror has a reflective surface that is curved inward and away from the light source. It creates flipped images at the focal point and it makes images bigger. It has a small viewing area. When parallel lines hit the mirror they reflect inwards. At the point where they meet is called the focus.

Question 3

Transparent

Answer 3

All the light goes through the object

Question 4

Trasnluscent

Answer 4

Some light passes through

Question 5

Opaque

Answer 5

No light passes through

Question 6

Luminescence

Answer 6

Luminescence is the emission of light produced by methods other than heat

Question 7

Chemiluminescence

Answer 7

Is the emission of light caused by a chemical reaction

Question 8

Bio-luminescence

Answer 8

Organisms that emit light known as bio-luminescent organisms also produce light through chemical reaction

Question 9

Law of reflection

Answer 9

The angle of a reflected ray of light is equal t the angel of the incident ray light

Question 10

Phosphorescence

Answer 10

The ability of a material to absorb energy from an electromagnetic radiation such as a flashlight and continue to emit light after the source is removed

Question 11

LED

Answer 11

It’s the most energy efficient, soft light, cheap to run expensive to buy can last about 14 years (25 000 hours)

Question 12

CFL

Answer 12

Middle in efficient, brightness is same as LED, cost more than LED to run, cheap to buy, can last 8 000 hours

Question 13

Incandescent

Answer 13

Non-efficient, soft light, cost a lot to sun cheap to buy. 750 hours

Question 14

Shadow

Answer 14

Is it formed when light hits opaque object. The two regions the penumbra and umbra

Question 15

Optics

Answer 15

Is the scientific study of the properties of light and the way technology uses it properties.

Question 16

How does light travel?

Answer 16

Light travels in a straight line until it hits an opaque object. It is called rectilinear propagation. Light doesn’t bend opaque materials. We absorb the light.

Question 17

The visible light spectrum

Answer 17

These colours of light for the visible light spectrum (red, orange, yellow, green, blue, violet.) These are the mixture of every colour.

Question 18

Illuminessence

Answer 18

The amount of light arriving at one place per unit area.

Question 19

Law of reflection

Answer 19

The reflected angel that comes out of an object that the ray came in.

Question 20

Diffuse

Answer 20

When light hits a bumpy surface, it scatters.

Question 21

Specular

Answer 21

When light hits a flat surface it comes out at the same.

Question 22

Optics

Answer 22

The scientific study of the properties of light and the why technology uses it.

Question 23

Luminescence intensity

Answer 23

How bright something is

Question 24

Or = Oi

Answer 24

The reflected ray is the same angle as the incident ray.

Question 25

Virtual vs Real

Answer 25

Virtual is what is behind the mirror and real is real.

Question 26

Refraction

Answer 26

The bending of light

Question 27

Defraction

Answer 27

The light going out

Question 28

Simple concave lens

Answer 28

You look into the curved part. light goes outwards and makes the object smaller.

Question 29

Double convex lens

Answer 29

lens has two bulging parts. the light slows inside the lens. the object is SUPER big. light goes inwards.

Question 30

Simple convex lens

Answer 30

you look through the bulging part. the light slows inside the lens. the object is bigger, light goes inwards.

Question 31

Double concave lens

Answer 31

both sides curve inwards but the light goes outwards. objects look smaller.

Question 32

Human eye - iris

Answer 32

The coloured part of the eye. controls the amount of light allowed into the eye.

Question 33

Human eye - pupil

Answer 33

Allows the light into your eye.

Question 34

Human eye - cornea

Answer 34

The outer protective of the eye

Question 35

Human eye - retina

Answer 35

Located at the back of the eye filled with specialised cells. When the light enters the eye it must hit them retina in order to be a healthy eye.

Question 36

Human eye - vitreous humor

Answer 36

maintains the shape of the eye with it’s jelly like substance.

Question 37

Human eye - cillian muscle

Answer 37

Located next to the iris. controls the iris movement in order to help with pupil dilation.

Question 38

Human eye - aqueous humor

Answer 38

Holds a watery like substance infront of the pupil and iris.

Question 39

Human eye - lens

Answer 39

This is a convex lens located right behind the pupil. When light enters into the eye it refracts the light inwards so it can hit the retina.

Question 40

Light rays in the eye

Answer 40

When light hits your eye there are many rays. The rays that hit the iris reflect outwards. The rays that hit the pupil go into the eye

Question 41

Pupil dilation

Answer 41

When there is less light your pupil is bigger and when there is more light your pupil is smaller.

Question 42

Retina and electricity

Answer 42

Retina turn light into electricity for your brain.

Question 43

Human eye - obtic nerves

Answer 43

Obtic nerves are located close to your retina. once the retina detects what the image is the obtic nerves send it to your brain.