1-12 uv, ir- en andere straling verdiepen (1.4)

Knowing more about radiation
(p. 49)
Bluetooth 
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Stationary
- Books
- Pen and pencil
- iPad


Report
- NO


Lessonup
- Yes
Bags in
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Slide 1: Diapositive
NatuurkundeMiddelbare schoolhavoLeerjaar 2

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Knowing more about radiation
(p. 49)
Bluetooth 
- On
- VPN off

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 we know of which materials stars are made. 
  • Explain why it is important
       to observe the universe 
       with satelites instead of  
       telescopes for example.

Slide 2 - Diapositive

HUBBLE TELESCOPE

Slide 3 - Diapositive

Slide 4 - Diapositive

Dark matter
Not visible except through gravity. 
New map where we find these in the universe

Slide 5 - Diapositive

Slide 6 - Diapositive

Two new moons of pluto were discovered.

Slide 7 - Diapositive

Slide 8 - Diapositive

Protoplanetary discs

- Possibility of life outside of earth is more probable than we think.

Slide 9 - Diapositive

Slide 10 - Diapositive

Gamma rays

Huge explotions, where more enery is released than what our sun emits in 10 billion years AND
it happens with elements of a low mass, like hydrogen and helium. 

Slide 11 - Diapositive

Slide 12 - Diapositive

Comet shoemaker

Collided with the planet Jupiter in 1994

Slide 13 - Diapositive

Slide 14 - Diapositive

Dark matter

The universe keeps on expanding, and 74% is dark energy...

The term can not yet be fully explained

Slide 15 - Diapositive

Slide 16 - Diapositive

Alien worlds ??


Slide 17 - Diapositive

Looking at the stars
  • How did astronomers gather all the information they have about the universe if stars are simply white sparkles in the night sky? 
  • They make observations in 
       all areas of the electro-
       magnetic spectrum

Slide 18 - Diapositive

Determining materials
  • If certain colours are omitted in the spectrum of a star, you can determine of which materials the star is made.  For example the spectrum of the sun is...

Slide 19 - Diapositive

Extraterrestrial forms of life?
  • An important condition for this would be the presence of water. 
  • This can be recognised because certain 
       colours are missing from the IR radiation.
  • From earth this can not be observed 
        (too much water vapour in the air).
  • That is why satallites investigate the infrared spectrum.

Slide 20 - Diapositive

Radiotelescopes
  • Receives radio waves and 
       microwaves from the universe.



  • X-rays can also not penetrate the water vapour in the air and therefore is also investigated by satellites. 
X-rays

Slide 21 - Diapositive

Do the following questions:
 61 to 64 (p. 50)
In your writingbook
Rules: 
- 6 minutes
- No talking

Finished early: look for more important discoveries of the HUBBLE telescope on the internet.
timer
6:00

Slide 22 - Diapositive

In a nutshell:
  • Black lines in the spectrum reveal the presence of certain substances. 
  • The vapour in the air blocks much
       radiation, and therefore satellites
       are useful in observing the  
       universe

Slide 23 - Diapositive