What Prevented Ole Rømer from Calculating an Accurate Value for the Speed

question 179

Multiple Choice

What prevented Ole Rømer from calculating an accurate value for the speed of light from his measurements of the delays in eclipse times of Jupiter's moons?

• A) The dimensions of the solar system, particularly the length of 1 au, were not known very accurately.
• B) Telescopes were not good enough at that time to show Jupiter's moons clearly, and accurate timings were not possible.
• C) The distance between Earth's orbit and Jupiter's orbit was unknown.
• D) The clocks available at that time were not sufficiently accurate.

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Definitions:

Valuation

The process of determining the present value of an asset or a company based on earnings, assets, and market comparisons.

Required Return

The minimum expected yield by investors to justify the risk of the investment.

Independent Projects

Investment projects whose cash flows are not affected by the accept or reject decision for any other project, allowing for independent evaluation.

IRR

Internal Rate of Return, a financial metric used to estimate the profitability of potential investments through calculating the rate of return where the net present value of all the cash flows (both positive and negative) from a project or investment equal zero.