3B Scientific SEK Optics - Manual (Page 19)

Exercise
Examine how selected beams of light are reflected on a concave mirror!
What do we need?
1 Optical lamp with power supply unit
1 Base plate
1 Universal mirror
1 Screen
1 Single-slot aperture
1 Three-slot aperture
1 Mask
additionally required:
1 Compasses
1 Ruler
Conducting the experiment
1. Attach the mask to the screen!
2. Place the optical lamp on the left side of the base plate, so that the light emerges parallel to the
right!
3. Place the screen in front of the optical lamp!
4. Insert the three-slot aperture into the aperture holder!
5. Place the universal mirror on the screen and bend it as marked on the mask!
6. Determine the focal point with three parallel beams! Mark the focal point! Then draw the centre of
the concave mirror! Enter the values for the focal length and the radius of the concave mirror in the
table!
7. Replace the three-slot aperture by a one-slot aperture!
8. Generate a parallel beam close to the axis! Change the position of the optical lamp! Observe the
parallel incident beam of light after it hit the concave mirror! Draw the incident and the reflected
beam of light!
9. Repeat the experiment with a focal beam!
10. Repeat the experiment with a centre point beam!
11. Name possible applications for concave mirrors! Explain one application!
ELWE Physical experiments for education in natural science and engineering
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1 SEG - OP 2.3 Reflection and Beam Paths on a Concave Mirror