3B Scientific SEK Optics - Manual (Page 9)

Exercise
Examine how shadows develop and under what conditions shadows are large or small!
What do we need?
1 Optical lamp
with power supply unit
1 Base plate
1 Shadow object
1 Screen
1 Mask
additionally required:
3 Sheets of white paper, 17 cm x 13 cm
1 Eraser
1 Sharpener
1 Adhesive tape
1 Ruler
Conducting the experiment
1
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experiment
1. Attach the mask to the base plate!
2. Place the optical lamp on the left side of the base plate, so that the light emerges conically to the
right!
3. Place the screen on the right side of the base plate!
4. Put the shadow object right in front of the screen as marked on the mask!
5. Measure the height and width of the shadow object and the height and width of the shadow! Enter
the values in table 1!
6. Slowly move the shadow object a few centimetres towards the lamp and observe how the shadow
changes! Discribe the result!
7. Put the shadow object back in front of the screen! Now hold the screen at different distances to the
shadow object and observe how the shadow changes! Discribe the result!
ELWE Physical experiments for education in natural science and engineering
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1 SEG - OP 1.3 Shadows