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Vwo 3, Lens equation + Magnification
Chapter 3, Light and lenses
Paragraph 3, Cameras and projectors
week 6
1th lesson of the week
1 / 23
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Slide 1:
Tekstslide
Natuurkunde / Scheikunde
Middelbare school
vwo
Leerjaar 3
In deze les zitten
23 slides
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interactieve quizzen
en
tekstslides
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Chapter 3, Light and lenses
Paragraph 3, Cameras and projectors
week 6
1th lesson of the week
Slide 1 - Tekstslide
Today
- Live lesson + lessonup
- Recap paragraph 2
- Continuation paragraph 3
+/- 30 minutes
Slide 2 - Tekstslide
Recap
Some questions about paragraph 2 will follow
Slide 3 - Tekstslide
timer
1:00
Paragraph 2 was about:
Slide 4 - Woordweb
A positive lens is:
timer
0:30
A
Convergent
B
Divergent
Slide 5 - Quizvraag
A positive lens:
timer
0:30
A
deflects rays of light outward
B
reflects rays of light back
C
deflects rays of light inward
Slide 6 - Quizvraag
A negative lens is:
timer
0:30
A
Convergent
B
Divergent
Slide 7 - Quizvraag
A negative lens:
timer
0:30
A
deflects rays of light inward
B
reflects rays of light back
C
deflects rays of light outward
Slide 8 - Quizvraag
After passing a positive lens, the rays of light converge and meet at one point, called:
timer
0:30
A
the point
B
the focal point
C
the burning point
D
the vocal point
Slide 9 - Quizvraag
With how many construction rays do you draw an image?
timer
0:30
A
2
B
3
C
1
D
4
Slide 10 - Quizvraag
Slide 11 - Tekstslide
Paragraph 2, lenses
In the following question match
the 'distance' with its position
Slide 12 - Tekstslide
timer
1:00
Object distance
Image distance
Focal distance
Slide 13 - Sleepvraag
Slide 14 - Tekstslide
Paragraph 3, Cameras and projectors
object distance = u
image distance = v
focal distance = f
Slide 15 - Tekstslide
Paragraph 3, Cameras and projectors
Lens equation
u = object distance
v = image distance
f = focal distance
f
1
=
u
1
+
v
1
Slide 16 - Tekstslide
Paragraph 3, Cameras and projectors
f = 2 cm
v = 5 cm
u = 1 / (1 / 2 - 1 / 5 ) = 3,33 cm
f
1
=
u
1
+
v
1
u
1
=
f
1
−
v
1
u
1
=
2
1
−
5
1
Slide 17 - Tekstslide
Paragraph 3, Cameras and projectors
Slide 18 - Tekstslide
An object is positioned 5 cm behind a positive lens (f = 3 cm).
Calculate the image distance to 1 decimal.
timer
2:00
Slide 19 - Open vraag
An object is positioned 4 cm behind a positive lens (f = 3 cm).
Calculate the image distance to 1 decimal.
timer
2:00
Slide 20 - Open vraag
An object is positioned 10 cm behind a positive lens. The sharp image is visible at 15 cm on
the other side of the lens.
Calculate the focal length.
timer
2:00
Slide 21 - Open vraag
Exercises
I will post a worksheet with exercises into the classroom
+ answers.
Not mandatory, just for those who want to practice.
Slide 22 - Tekstslide
Good day
Relax
Enjoy
If there is information I will put it in Classroom!
Slide 23 - Tekstslide
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