Date: Mon Apr 30 17:42:59 2007

Author: Tom Senior

Subject: Re: Student spectrometer recommendations?

Project Star has a pretty good spectrometer that may be close to the
accuracy you wish:

It uses the holographic diffraction grating and when you look at sun light
reflected from paper, you can make out the sodium fronhoffer lines.

Tom Senior

On 4/30/07 1:16 PM, "Andrew Dougherty" wrote:

> Does anyone have a good recommendation for spectrometers suitable for
> introductory physics labs? We are currently using some home-built piano
> spectrometers, but are in need of additional units, and are hoping to
> avoid building them in-house.
> The spectrometers are currently used to measure the wavelengths of
> light from a hydrogen lamp. We don't need high precision or accuracy.
> That is, we're not looking at fine structure or trying to distinguish D2
> and H2. Accuracy to +- 10 nm would be fine for this group of students.
> I'm perhaps more interested in durability -- can we get consistently
> good performance year after year without laborious set-up each year.
> I'm aware of PASCO's "Student Spectrometer", but at $1159 per unit, it
> seems too expensive by about a factor of 3 for what we need.
> Thanks in advance,