1-2 Explaining how we see things with the eye (1.1)

How do we see colour
(p. 14)
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Stationary
- Books
- Pen and pencil
- iPad


Report
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Lessonup
- Yes
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Slide 1: Diapositive
NatuurkundeMiddelbare schoolhavoLeerjaar 2

Cette leçon contient 23 diapositives, avec quiz interactifs et diapositives de texte.

time-iconLa durée de la leçon est: 50 min

Éléments de cette leçon

How do we see colour
(p. 14)
Bluetooth 
- On


Stationary
- Books
- Pen and pencil
- iPad


Report
- NO


Lessonup
- Yes
Bags in
the cuboard
Phones in the phone holder

Slide 1 - Diapositive

Lesson goals:
  • Explain how the eye can see.
  • How do the colours of a tv work.
  • A coloured object under 
      a coloured lamp
       ... what happens?

Slide 2 - Diapositive

Jigspace - the eye
  1. Work in groups of two
  2. Install the app - jigspace
  3. Look for the eye
  4. Complete the worksheet 
Time: 12 minutes
And then? Then we will discuss it


We will still use jigspace 3 more times, so dont delete it
Compatibility:
- iPhone 6 or later
- iPad 6th generation
- iPad pro
timer
12:00

Slide 3 - Diapositive

How does the eye work?


  • You see colours with light-sensitive cells in your eyes. 
  • These cells are called cone cells. 
  • There are seperate cones 
       to observe green, blue and 
       red light. 
  • Cones can also see 
       neighbouring colours in the spectrum

Slide 4 - Diapositive

Slide 5 - Diapositive

Colours of the tv
  • A tv only uses three colours, 
       red, green and blue lines.
  • So for yellow the tv sends our green and red light.
  • A good example is a
       'living colours' -lamp

Slide 6 - Diapositive

Under a coloured lamp
  • A sodium lamp emits orange light.
  • A blue car under an orange lamp appears black, because a blue car can only 
     reflect blue light

Slide 7 - Diapositive

A colour tv only works with red, yellow and blue pixels.
A
True
B
False

Slide 8 - Quiz

With only three colours, you can make all the colours of the rainbow.
A
True
B
False

Slide 9 - Quiz

Under a coloured lamp it is possible for objects of colour to appear black.
A
True
B
False

Slide 10 - Quiz

Most colour blind people can not distinguish between red and green.
A
True
B
False

Slide 11 - Quiz

Which colors are NOT observed by the cones?
A
Red
B
Yellow
C
Blue
D
None

Slide 12 - Quiz

Which cones react more strongly to the light of a candle?
A
Red and blue
B
Red and green
C
Green and blue

Slide 13 - Quiz

Why do you not see colour when observing things in the moonlight.
A
Rods dont see colours
B
Cones dont see colours
C
There is no colour present

Slide 14 - Quiz

Which colour is absorbed by a red surface?
A
Red
B
Blue
C
Yellow
D
Green

Slide 15 - Quiz

Do the following questions:
11, 12, 14 (p. 15)
In your writingbook
Rules: 
- 5 minutes
- No talking

Finished early: Research on the web how tv's work
timer
5:00

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Slide 21 - Diapositive

Slide 22 - Diapositive

In a nutshell:
  • Eyes have rods and cones by which we observe colours. 
  • A tv only emits green, blue and red light. Through a combination of these colours, other colours are observed.
  • Under a coloured lamp, 
       colours may appear different

Slide 23 - Diapositive