{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

1A_experiment_H_spectrum

# 1A_experiment_H_spectrum - 309 LINE SPECTRUM OF HYDROGEN...

This preview shows pages 1–2. Sign up to view the full content.

309 LINE SPECTRUM OF HYDROGEN OBJECTIVES FOR THE EXPERIMENT The student will be able to do the following: 1. Calculate the frequencies and wavelengths for the light emitted in the first five transitions in the Balmer series for hydrogen. 2. Experimentally determine degree of diffraction reading for light sources using a spectroscope. 3. Determine wavelengths from experimental degree of diffraction readings and a graph of degree of diffraction vs. wavelength. 4. Calculate percent error. BACKGROUND The purpose of the experiment is to study the Balmer Series of the line spectrum of hydrogen. This is the portion of the line spectrum of hydrogen that lies in the visible range. The wavelengths for this series will be determined in two ways. 1. The actual wavelengths for the first five transitions in the Balmer Series will be calculated using the Rydberg equation and the relationship between frequency and wavelength. ν = frequency R = 3.289 x 10 15 s - 1 n high = 3,4,5, .... c = speed of light = 2.9979 x 10 8 m/s 2. Three or four of the wavelengths for the lines in the hydrogen spectrum will also be determined experimentally using a hydrogen light source and a spectroscope. The spectroscopes used in the experiment do not register the position of the lines in terms of wavelength but in terms of degree of diffraction. Different diffraction gratings will yield different angles of diffraction, so each spectroscope will give slightly different angles for the same wavelengths. To obtain the wavelengths, we must first set up a calibration graph for your spectroscope so that the degrees can be converted to wavelengths.

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern