Property of Light Lab

Property of Light Lab - Bryan Baum Astrophysics Property of...

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Bryan Baum Astrophysics Property of Light Lab In this lab we tested the inverse square law relating apparent brightness to distance. We also measured the emission spectrum of hydrogen. For the inverse square law test we used and stationary light bulb and used a light detector to measure the brightness at a variety of distances from the light bulb. We performed background subtraction by measurements made with a black card in front of the bulb. The best fit exponent was 2.0113 and the exponent for inverse square law was 2 so the best fit to our data was very close to the inverse square law value. For the second part of the lab we measured the emission spectrum of hydrogen. We used a diffraction grating attached to a spectrometer directly across from a hydrogen discharge tube to measure the positions of spectral lines. We measured the distances of the spectral lines by looking into the diffraction grating and noting where they lied on the spectrometer. We used this data to calculate the wavelengths of each Balmer series line. This came out to be H Alpha= 6.478 x 10^-7 m
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This lab report was uploaded on 04/07/2008 for the course ASTROPHYSI 101 taught by Professor Brown during the Spring '08 term at Swarthmore.

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Property of Light Lab - Bryan Baum Astrophysics Property of...

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