I believe the answer is to get a complete impression of the person.
It’s not to force the interviewee to give straight answers because they might be more stressed.
It’s not to give the interviewee time to think over questions because that would make more sense to give them a paper to fill out as an interview.
Answer:
Because the longer the focal length, the smaller the patch of sky you're observing. But a longer focal length also gives a higher possible magnification.
Throught the entire speech, Eisenhower tone remains positive and sincere. He speaks like he is just another average person, which makes him seem friendly. Example, Eisenhower ends the speech with a simple and unpretentious ¨Thank you, and good night¨and not with the new almost obligatory, ¨God bless the United States of America¨
