Lab5 Worksheet.doc - PHYS 1403 Lab 5 THE ASTRONOMICAL UNIT SPEED OF LIGHT Worksheet Enter your answers to each question in the data tables and yellow

# Lab5 Worksheet.doc - PHYS 1403 Lab 5 THE ASTRONOMICAL UNIT...

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PHYS 1403 Lab 5: THE ASTRONOMICAL UNIT & SPEED OF LIGHT Worksheet Enter your answers to each question in the data tables and yellow highlighted areas below. When completed, please save and upload this file to the assignment - Lab 5 - in Canvas. Remember to show your work on calculations for full credit. PRELAB QUESTIONS 1. What is parallax? The shift of position and angle based on the point of view. 2. How was Roemer able to compute a value for the speed of light? He observed Jupiter’s moon for years, when he notice a discrepancy increasing as earth gets away and decreasing as it gets closer. EXERCISE 1. In the first half of the 19th Century the parallax of Mars was measured and found to be approximately 0.01 o when this planet was at its closest point to the Earth. The diameter of the Earth was known to be approximately 13,000 km . a. Use the data on page one of the lab to determine the distance between Earth and Mars when Mars is at opposition (i.e., when it is at its closest point to the Earth). Be sure to express this distance in AU . (As an example, the distance between Earth and Saturn when Saturn is at opposition is 9.539 AU – 1 AU = 8.539 AU.) Distance to Mars at opposition = 0.524 AU b. Use the parallax of Mars at opposition, the Earth's diameter , and parallax formula (Object Distance = 57.3 [Earth Diameter/Parallax Angle]) to calculate the 19th

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