licht klas 2

• Middelbare school

eye

1. eys
2. eyes

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

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

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

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

1. True
2. False

With only three colours, you can make all the colours of the rainbow.

1. True
2. False

Under a coloured lamp it is possible for objects of colour to appear black.

1. True
2. False

Which colors are NOT observed by the cones?

1. Red
2. Yellow
3. Blue
4. None

Which cones react more strongly to the light of a candle?

1. Red and blue
2. Red and green
3. Green and blue