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How could you use the diffraction of a laser beam by a slit to determine the wavelength of the laser light?
Wiki User
∙ 11y ago
Students will determine the wavelength of a helium neon laser. Students will collect
six different sets of measurements in this experiment and use these measurements to
solve for the wavelength of the laser.
Preparations:
Put out one or sets of a laser, screen and two diffraction gratings for student use.
The intent is to have the laser beam pass through a diffraction grating resuling in
an interference pattern on the screen. Either the screen or the grating will need
to be movable since each grating will be used three times at different distances
from the screen. Decide ahead of time which object will be moveable. Each
of the three distances should yield a clearly observable interference pattern.
The photos on the following page show visual representations of the materials,
setup, and interference patterns generated during the experiment. A graphic of
the electromagnetic spectrum with wavelengths specified is also shown.
Procedure:
Have students record the diffraction grating lines (mm) and convert them into
centimeters to determine the slit width (d). Students will also record the distance
from grating to screen (L) and distance from a maximum bright spot to an
adjacent maximum bright spot (x). Two different gratings are to be used at three
different distances from the screen and measurements recorded. Students will
then use these measurements to determine the wavelength of the laser.
Connection to APOL Biocomplexity Project:
Lasers are of many wavelengths and each type of laser has a particular application
based on that wavelength. The lasers used in the APOL project are designed
to give a final output of 4.3 x10-6 meters. This is in the mid-infrared range and
is invisible to the eye. In this activity, a laser that has an output visible to the
eye will be necessary. The He-Ne laser is the most common type of laser in the
school environment.
Solution:
Most schools will use a standard red helium neon laser. The wavelength for this
laser is 633 nanometers. Some schools may have access to helium neon lasers of
different wavelengths. The results for those lasers should be as follows: Green:
543.5 nm, Orange: 612 nm, and yellow: 594 nm.
Wiki User
∙ 11y ago
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What are the key applications for laser diffraction?
There are numerous applications for laser diffraction. Their key applications include using them as part of a particle sizing technique, and using them in laser diffraction spectroscopy.
Wave length of carbon dioxide laser?
The wavelength of carbon dioxide laser usually emit at a wavelength of 10.6 μm.
What is the Ruby laser wavelength?
A ruby laser is a red laser with a wavelength between 694 nm and 628 nm. 1 nanometer = 1×10−9 meter.
What could you do to make the beam of light from the laser refract less as exits the prism?
I.ncrease the wavelength of the light
What will produce more widely spaced fringes of light when passed through a diffraction grating light from a red laser or green laser?
Light from a red laser!
What are the key applications for laser diffraction?
There are numerous applications for laser diffraction. Their key applications include using them as part of a particle sizing technique, and using them in laser diffraction spectroscopy.
What is the difference between laser diffraction and ordinary light diffraction?
I would guess its nothing, because technically speaking a laser uses concentrated light
Wave length of carbon dioxide laser?
The wavelength of carbon dioxide laser usually emit at a wavelength of 10.6 μm.
What kind of laser is used in diffraction grating experiment?
laser is not used in that experiment. that was mercury lamp which is used for that exp.
What is the Ruby laser wavelength?
A ruby laser is a red laser with a wavelength between 694 nm and 628 nm. 1 nanometer = 1×10−9 meter.
What could you do to make the beam of light from the laser refract less as exits the prism?
I.ncrease the wavelength of the light
What does mm mean on a laser pointer?
Millimeter and it shows the wavelength of the laser.
What will produce more widely spaced fringes of light when passed through a diffraction grating light from a red laser or green laser?
Light from a red laser!
Meaning of laser mn?
nm means nanometer, that being the wavelength of that laser.
How can you see the beam from a laser?
Power applied to laser, wavelength & angle of viewing it.
What is the Wavelength of a red laser pointer?
Typically, most pocket red laser pointers have wavelengths that range between 630nm and 680nm. A helium neon red laser pointer has a wavelength of 633nm.
A helium neon laser emits light of wavelength 633 nm Light from an argon laser has a wavelength of 515 nm Which laser emits the higher frequency light?
according to the wave theory of light,we have the relation that wavelength is inversely proportional to the frequency,therefore the electromagnetic wave with the lower wavelength will have higher frequency..
