QUES: Reflections generally affect polarization. For radio waves, one important reflector is the ionosphere which can change the wave's polarization. Thus for signals received following reflection by the ionosphere (a skywave), a consistent polarization cannot be expected. For line-of-sight communications or ground wave propagation, horizontally or vertically polarized transmissions generally remain in about the same polarization state at the receiving location. Matching the receiving antenna's polarization to that of the transmitter can make a very substantial difference in received signal strength.

What reflector can change the waves polarization?
What is the answer?
ANS: ionosphere
QUES: Definitions of "Southeast Asia" vary, but most definitions include the area represented by the countries (sovereign states and dependent territories) listed below. All of the states except for East Timor are members of the Association of Southeast Asian Nations (ASEAN). The area, together with part of South Asia, was widely known as the East Indies or simply the Indies until the 20th century. Christmas Island and the Cocos (Keeling) Islands[citation needed] are considered part of Southeast Asia though they are governed by Australia.[citation needed] Sovereignty issues exist over some territories in the South China Sea. Papua New Guinea has stated that it might join ASEAN, and is currently an observer.

What islands are part of Australia?
What is the answer?
ANS: unanswerable
QUES: On August 30, 2015, West was presented with the Michael Jackson Video Vanguard Award at the MTV Video Music Awards. In his acceptance speech, he stated, "Y'all might be thinking right now, 'I wonder did he smoke something before he came out here?' And the answer is: 'Yes, I rolled up a little something. I knocked the edge off.'" At the end of his speech, he announced, "I have decided in 2020 to run for president."

What award was presented to Kanye West on August 30, 2015?
What is the answer?
ANS:
Michael Jackson Video Vanguard Award