3B Scientific Transmission Grating 300 Lines User Manual

3B SCIENTIFIC® PHYSICS

C

B

A

θ

D

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U19511 Grating 600 lines/mm

U19512 Grating 300 lines/mm

Instruction sheet

6/03 ALF

®

Transmission grating for spectroscopic examinations
and for experiments on diffraction and interference.
Suitable to resolve the Na-D lines.

3.1 Demonstration of diffraction by a grating

• Mount diffraction grating in holder (e.g. Multi­component holder U21810)

• Grating must be brought into a parallel beam of
light.

1. Safety instructions

• Diffraction can be observed.

• To avoid scratching or soiling the surface of the

grating, hold the slide only by its edges.

3.2 Use of a spectrometer and goniometer

• Mount diffraction grating in holder of spectro­meter-goniometer.

2. Description, technical data

Gratings with 300 resp. 600 lines per mm, mounted on
glass carrier. Both gratings have a high resolution
power, provide a sharp, bright spectrum and are suit­able for use in precision spectrometers such as spec­trometer-goniometer U14416.

• Adjust the angles according to illustration.

• View the light diffracted by the line grating

through the spectrometer telescope. Diffraction
of higher order can be observed.

• If a sodium lamp is used, the doublet may be
viewed when θ = 10,5° and

θ

= 21°.

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The 300 line grating U19512 enables particularly well
measurements to be taken of the separation of Na-D
lines.

Dimensions: 38 mm x 50 mm
Size of grating: 24 mm x 24 mm
No. of lines: 300 resp. 600 lines / mm
Grating constant: 3,3 µm resp. 1,7 µm

3. Operation

Note: The grating has a stronger spectrum on one side.

For best results mount the diffraction grating in such
a way, that the grating faces the light source.

3B Scientific GmbH • Rudorffweg 8 • 21031 Hamburg • Germany • www.3bscientific.com • Technical amendments are possible

A: Light source
B: Collimator
C: Grating
D: Observation tube

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