§3 Making X-ray photographs

§3 
Making X-ray photographs
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Slide 1: Tekstslide
NatuurkundeMiddelbare schoolhavoLeerjaar 3

In deze les zitten 19 slides, met interactieve quizzen en tekstslides.

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§3 
Making X-ray photographs

Slide 1 - Tekstslide

Learning objectives
  • You can explain what can happen when electromegnetic radiation hits an object.
  • You can describe how X-ray pictures are taken.
  • You can list the health risks of X-rays.
  • You can explain how the biological damage from radiation is expressed.
  • You can state and explain the safety rules for working with X-rays
  • You can explain how the various half-value layes are used. 

Slide 2 - Tekstslide

Last lesson
  • Everything about electromagnetic radiation. 

Slide 3 - Tekstslide

What is not a characteristic of electromagnetic radiation?
A
Always a speed of 3,0*10^8 m/s
B
Can travel through vacuum.
C
Thewavelengtiscalledlabda(λ)
D
Has different speeds.

Slide 4 - Quizvraag

Question 6:
Miriam is reading the website of Radio Rijnmond: ''Our transmissions have been on 93,4 MHz sins 1 july.''

Calculate the wavelength of the radio waves.

λ=fc

Slide 5 - Open vraag

mega = 1.000.000

Slide 6 - Tekstslide

Slide 7 - Tekstslide

What is a spectrum?
A
An prisma.
B
An artificial light source.
C
A range of radiation.
D
A James Bond movie.

Slide 8 - Quizvraag

Radiation
Absorption=
Radiation is absorbed
Transmission=
Radiation passes through
Reflection=
radiation is reflected back
Absorption
Transmission
Reflection

Slide 9 - Tekstslide

Absorption + Reflection

Slide 10 - Tekstslide

The transparency of the atmosphere to various types of radiation

Slide 11 - Tekstslide

Hazards

Slide 12 - Tekstslide

X-ray
X-ray source
Detector screen
Body part

Slide 13 - Tekstslide

Equivalente doses
  • Is a measure of the biological damage that occurs
  • Unit is Sievert (Sv).
  • 1 Sv leads roughly to a 5% higher chance of ever getting cancer (20 mSv is the max).

Slide 14 - Tekstslide

Half-value layer

Slide 15 - Tekstslide

Protection 
  1. Distance;
  2. Wearing an lead apron;
  3. Lead inside walls and windows 
    ('Lead glass') 

Slide 16 - Tekstslide

What do bones do with X-rays in particular?
A
Let it through
B
Absorb it
C
Reflect it

Slide 17 - Quizvraag

Right/wrong

Parts that are dark in an X-ray such as muscles, organs and other tissues have absorbed a lot of X-rays.
A
Right
B
Wrong

Slide 18 - Quizvraag

H6 §3 - 3 till 7

Slide 19 - Tekstslide