Parallax and Uncertainty Worksheet-1-3

docx

School

Clemson University *

*We aren’t endorsed by this school

Course

1020

Subject

Physics

Date

Dec 6, 2023

Type

docx

Pages

Uploaded by GrandGuanacoMaster1041

Parallax and Uncertainty Worksheet These lab activities have evolved over years of use in Clemson University’s Department of Physics and Astronomy general astronomy laboratory. Contributors include Tom Collins, Mark Leising, Neil Miller, Peter Milne, Grant Williams, Donna Mullenax, Jessica Crist, Keith Davis, Amber Porter, Lea Marcotulli, and David Connick. Please direct all questions, complaints, and corrections to David Connick (dconnic@clemson.edu) who is responsible for all errors and omissions. Student Name: Kenni Medvar Lab Section:__________ II. Measuring by Hand 1) What is the inherent uncertainty of the ruler provided? (use metric units) 0.5 mm 2) Fill in the table with your handmade measurements for the apparent shift in position of Star A and Star B. Star First Measurement Second Measurement Third Measurement Average of Measurements A 5.5 mm 5.5 mm 5.6 mm 5.53 mm B 1.6 mm 1.6 mm 1.5 mm 1.56 mm 3) What is the deviation of your measurements from the average? (this is experimental uncertainty) For star a the deviation would be .07 and for star b the deviation would be . 04 4) Which of your uncertainties is larger (inherent or experimental)? (Denote which method and the value) The uncertainties inherent are larger than experimental. 5) Write your answer for the apparent change in position of each star with uncertainty attached.

(Example: 5.2 +/- 0.2 cm) Star A: 5.6 +/- 0.07 Star B: 1.6 +/- 0.04 6) When measuring distances in the sky we use units of arcseconds to denote changes in position on the celestial sphere. Using the scale provided for the images determine the conversion factor from centimeters to arcseconds. Conversion factor (arcseconds per cm):: .75 cm per arcsecond 7) Using the uncertainties in your measurements, determine the range of possible position change by completing the table. Star Min change (cm) Min change (arcseconds) Max change (cm) Max change (arcseconds) A 5.5 cm 7.3 5.7 7.6 B 1.6 cm 2.1 1.9 2.5 8) Write the change in position with uncertainty attached in units of arcseconds for each star. Star A: 7.45 +/- 0.15 Sar B: 2.3 +/- 0.2 9) Which star has the larger change in position? Star A 10) What is the minimum difference in the change in position between the two stars considering the uncertainties in measurements? The minimum difference was 3.6 cm. 11) What does the change in position of each star tell you about their distance from the Earth? Which star is closer to the Earth?

The star that changed position the most was Star A, that means that it is closer to the Earth. 12) Multiplicatively speaking, how much farther away is the more distant star compared to the closer star? Star B is about 3.3 times farther away than Star A. III. Uncertainty in Data 13) Calculate the average redshift of Star C. 215.3 14) What is the uncertainty in the redshift for Star C, state the uncertainty from all sources. (inherent and experimental) Inherent uncertainty is +/- .5 micrometers and experimental is +/- .3 micrometers. 15) Provide the redshift of Star C with uncertainty. 215.3 +/- .3 micrometers 16) Use the conversion from redshift to radial velocity to find the radial velocity of Star C with uncertainty. (remember you can use maximum and minimum values to carry uncertainty) The radial velocity with uncertainty is 305.94 +/- 0.43 km/s 17) Calculate the average redshift for Star D. 211.7 micrometers 18) What is the uncertainty in the redshift for Star D, state the uncertainty from all sources. Inherent uncertainty is +/- 0.5 micrometers and the experimental uncertainty is +/-,7 micrometers.

Your preview ends here

Eager to read complete document? Join bartleby learn and gain access to the full version

Access to all documents
Unlimited textbook solutions
24/7 expert homework help

19) Provide the redshift of star D with uncertainty. 211.7 +/- .7 micrometers 20) Use the conversion from redshift to radial velocity to find the radial velocity of Star D with uncertainty. (remember you can use maximum and minimum values to carry uncertainty) 211.7 +/- .7 micrometers 21) What is the range of values for radial velocity for Star C? 300.78 +/- . 0.95 km/s 22) What is the range of values for radial velocity of Star D? [211, 212.34] 23) Does this activity support the hypothesis that the radial velocity of stars should decrease as they get farther from the center of a galaxy? (Write at least 3 sentences using the data you collected to justify your answer)

Related Documents

Weighing a Galaxy Worksheet.docx.pdf

Kami Export - H-R Diagram lab Worksheet.pdf

Spectral Classes Worksheet-1.docx

lab 9.pdf

Expansion of the Universe-1.docx

Lab 7 Eclipsing Binary Stars (1).docx

Recommended textbooks for you

Inquiry into Physics

Physics

ISBN:9781337515863

Author:Ostdiek

Publisher:Cengage

Physics for Scientists and Engineers: Foundations...

Physics

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Cengage Learning

College Physics

Physics

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:OpenStax College

Astronomy

Physics

ISBN:9781938168284

Author:Andrew Fraknoi; David Morrison; Sidney C. Wolff

Publisher:OpenStax

University Physics Volume 3

Physics

ISBN:9781938168185

Author:William Moebs, Jeff Sanny

Publisher:OpenStax

Foundations of Astronomy (MindTap Course List)

Physics

ISBN:9781337399920

Author:Michael A. Seeds, Dana Backman

Publisher:Cengage Learning

SEE MORE TEXTBOOKS

Recommended textbooks for you

Inquiry into Physics
Physics
ISBN:9781337515863
Author:Ostdiek
Publisher:Cengage
Physics for Scientists and Engineers: Foundations...
Physics
ISBN:9781133939146
Author:Katz, Debora M.
Publisher:Cengage Learning
College Physics
Physics
ISBN:9781938168000
Author:Paul Peter Urone, Roger Hinrichs
Publisher:OpenStax College
Astronomy
Physics
ISBN:9781938168284
Author:Andrew Fraknoi; David Morrison; Sidney C. Wolff
Publisher:OpenStax
University Physics Volume 3
Physics
ISBN:9781938168185
Author:William Moebs, Jeff Sanny
Publisher:OpenStax
Foundations of Astronomy (MindTap Course List)
Physics
ISBN:9781337399920
Author:Michael A. Seeds, Dana Backman
Publisher:Cengage Learning