3B Scientific SEK Optics - Manual (Page 15)

Exercise
Examine the incident light on a plane reflecting surface!
What do we need?
1 Optical lamp
with power supply unit
1 Base plate
1 Universal mirror
1 Single-slot aperture
1 Screen
1 Mask
additionally required:
1 Triangle with right angle
1 Coloured pen
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 light emerges parallel to the right!
3. Place the screen in front of the optical lamp!
4. Insert the single-slot aperture into the aperture holder!
5. Place the universal mirror on the screen as marked on the mask!
6. Adjust an angle of incidence α = 30° by changing the position of the lamp! Draw the incident and
the reflected beam on the mask!
7. Draw the axis of incidence! Measure the angle of incidence and the angle of reflection! Enter the
values in the table!
8. Turn the lamp a little and adjust a different angle of incidence! Draw the incident and the reflected
beam. Draw the axis of incidence and measure the angle of incidence and the angle of reflection!
Use a coloured pen! Enter the measured values in the table!
9. Turn the lamp a little further! Again draw the beams and the axis of incidence and measure the an-
gles of incidence and reflection!
10. Compare the angle of incidence to the angle of reflection and describe the result!
11. Name practical applications for the use of reflection! Give one example!
ELWE Physical experiments for education in natural science and engineering
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1 SEG - OP 2.1 Reflection on a Plane Mirror