While researching a topic, a student has taken the following notes:
<ul> <li>The 2017 LIGO detection observed gravitational waves from a neutron star merger.</li> <li>Telescopes worldwide also detected the corresponding electromagnetic signals.</li> <li>This was the first time the same astronomical event was observed in both gravitational waves and light.</li> <li>Such "multimessenger" observations enable studies impossible with one signal alone.</li> <li>The event helped confirm theories of heavy-element formation.</li> </ul> The student wants to introduce a counterintuitive idea to an audience that thinks of astronomy as observing only light. Which choice most effectively uses relevant information from the notes to accomplish this goal?Which choice most effectively makes the student's point?
- A
LIGO observed gravitational waves from a neutron star merger.
- B
The 2017 detection helped confirm theories of heavy-element formation.
- C
Telescopes detected the corresponding electromagnetic signals.
- Dcheck_circle
Although astronomy is often thought of as observing light, the 2017 LIGO event was observed simultaneously in gravitational waves and electromagnetic light, a 'multimessenger' first.
Explanation
A counterintuitive frame must invoke the prior assumption (light only) and contrast it. Choice C does this and names both signal types. The others omit the prior assumption.