Even Though Each Item on the Distance Ladder Is Only

question 33

Multiple Choice

Even though each item on the distance ladder is only effective within a certain distance range, the concept is still effective because

• A) each technique produces exact distances on its own.
• B) the distance ladder concept can be verified by looking in different wavelength ranges.
• C) each step can be calibrated through its overlap with the previous step.
• D) distances are ultimately relative, and not absolute.
• E) the time delay due to light travel time is significant enough to limit the accuracy of distance measurements anyway.