1-1 Introduction and seeing colour (1.1)

• Natuurkunde
• Middelbare school
• havo
• Leerjaar 2

Introduction and seeing colour 

(p. 10)

Bluetooth 

- On

Stationary

- Books

- Pen and pencil

- iPad

Report

- NO

Lessonup

- Yes

Bags in

the cuboard

Phones in the phone holder

Lessonup class code

G2X - erctu

A2X - gcmyd

Lesson goals:

• General discussion of class rules
• Which colours do we find in the rainbow
• Which light sources emit 

       the whole spectrum of light

• Explain how we see coloured 

        object

Homework: Pin-hole camera

Activity 10 (p. 31)

To be done in 

three weeks time

Rules

• We respect each other
  
• We keep the class clean 
  
• We do our best
  

What do you need in the class:

• Writing book, A4 blocks, for every lesson. Bring it even if you are writing a test.
  
• It is wise to have a file in which you keep your tests. Alternatively you can make a photo of the front page with your mark. If there are enquiries you always have it with you. 
  

• CALCULATOR, a Casio!! You are not allowed to use your mobile phone or your tablet as calculator because you must learn how to use your own calculator in the class. 
  
• Stationary such as a pen, pencil and ruler.
  
• Sometimes you might need a protractor or a compass, so have it with you. 
  

Work neatly

• Start a new lesson with a heading and a date in your writing book, and end each lesson by ruling off.
  
• Write neatly with a blue or a black pen, and always make diagrams and drawings with a pencil.
  
• You will be awarded a mark on your report for your book, so keep it neat, and do your work in it.
  

Activity 2 (p. 18)

also, write the coulours of the rainbow

Rainbow

A rainbow occurs because 

raindrops break up the light 

of the sun into its different 

colours

Colours of the rainbow:

• Red       • Orange      • Yellow      • Green      • Blue     • Violet

Colour spectrum

Band of colours where all the coulours of the rainbow are next to each other.

Light source

Something that gives off

its own light

How do we see colours?

- A blue object only reflect blue 

   light and absorbs all the other 

   colours

- A white object reflects all the 

   colours

- A black object absorbs all the 

   colours

Houses in warm countries

In warm countries houses are usually painted in light colours, because that reflects more 

light, and therefore more 

energy. This way the house 

stays nice and cool inside. 

In the rainbow you see all the known colors

1. True
2. False

The rainbow consists of 6 colours.

1. True
2. False

A red object absorbs red light.

1. True
2. False

A white object reflects all the light.

1. True
2. False

Which colour does not belong to the
6 colors of the rainbow?

1. Red
2. Green
3. Purple
4. Violet

Which is NOT a light source?

1. Sun
2. Moon
3. Halogen lamp (on)
4. UV lamp (on)

Explain in your own words why we see colours.

Do the following questions:

 2 to 8 p. 12

In your writingbook

Rules: 

- 10 minutes

- No talking

Finished early: Research light of street lanterns on the web

In a nutshell:

• The colours of the rainbow are 

       red, orange, yellow, green, blue, violet.

• Light sources such as the sun emmit a continuous spectrum, and led-lamps and fluorescent tubes only certain colours.

• We see colours because certain colours are reflected and others are absorbed.