Exercise sheet 1a H8 light
Write in pencil !!!!!
Shadow and penumbra (half shade)
1
With an eclipse of the sun, there are some places on Earth that receive no direct

sunlight. That is because the moon holds back the beams from the sun.
At a particular moment such a total eclipse can be seen on Earth.
The three heavenly bodies in this situation have been drawn in the diagram below.
This drawing is not to scale.
Draw accurately on this diagram the area on Earth where a partial eclipse can be
observed. Indicate this place clearly.
2
A TL-lamp hangs somewhere from the ceiling.
 The core of the shadow of the table top, made by the TL-lamp, is shown.
a)
Draw the TL-lamp in the right place, with the help of a construction.
b)
Then draw the partial shade (or penumbra).
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Exercise sheet 1a H8 light
3
Draw the silhouette of the Sun on the screen.
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Exercise sheet 1a H8 light
The law of reflection ∠i = ∠t
4
A light beam falls on a flat mirror.

a)
Construct the angle of the reflected light beam.
b)
Indicate what is normal, the angle of incidence and the angle of reflection.
c)
How many degrees is the angle of incidence?
5
In the drawing below are five light beams which are bounced off of,or reflected from,
a mirror. Draw the missing beams of light. Tip: draw the normal first.
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Exercise sheet 1a H8 light
Mirror image (Object distance is image distance)
6
Construct the mirror image of the pictures below;

Figure 6a
Figure 6b
7
Draw the mirror writing in figure 7.
Figure 7
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Exercise sheet 1a H8 light
8
Construct the mirror image of the cat in figure 9.
Figure 9
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Exercise sheet 1a H8 light
Mirror image 2 (mirror image and light beams)
9

Anja is standing in front of a dressing mirror.
She is looking in the mirror to see how her new skirt looks on her.
Construct in figure 9 how the light beams go from points P and Q of the skirt, via the
mirror, to Anja’s eye.
Figure 9
10

Jan sees how a flagpole is reflected in a canal.
a
Draw the reflection of the flagpole.
b
Jan sees the top of the flagpole in the water.
Show the beam of light that comes from the top and reaches Jan’s eye via the
water.
Figure 10
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Exercise sheet 1a H8 light
Field of vision
11
Construct the field of vision from the point
O in figure 11.
O
Figure 11
Figure 12
12
Construct the cashier’s field of vision in figure 12.
13

A mirror has been placed at a t-junction because the view is hindered by two houses.
a
Construct the field of vision that Martijn has in A via the mirror.
b
Is the mirror well placed?
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Exercise sheet 1a H8 light
Extra plus (Atheneum)
14
The boundaries of the beam of light that come out of lamp L are shown in the
diagram below.
This beam lights up mirror S1 completely. Mirror S2 stands perpendicular to mirror
S1.
Mirror S1 stands opposite a wall.
The drawing is to scale.
Determine by construction which part of the wall is lit up by reflected light.
Atheneum
15
A car driver looks in the side mirror of his car. The side mirror consists of two flat
mirrors, AB and BC that are at a small angle to each other. (See drawing below,
with pupil P and mirror ABC) Construct the area that the driver can see with this
mirror.
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Exercise sheet 1a H8 light
Atheneum
16
A spy is hiding in the castle tower.
If he closes the window, the moonlight will be reflected by the window onto the
besiegers, and that will be the signal for the besiegers to attack.
The direction of the moonlight is shown by an arrow and is parallel.
a)
Show with a drawing whether there are besiegers who can see the reflected
moonlight.
b)
Construct the silhouette of the pyramid wall.
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