QUES: Infrared tracking, also known as infrared homing, refers to a passive missile guidance system, which uses the emission from a target of electromagnetic radiation in the infrared part of the spectrum to track it. Missiles that use infrared seeking are often referred to as "heat-seekers", since infrared (IR) is just below the visible spectrum of light in frequency and is radiated strongly by hot bodies. Many objects such as people, vehicle engines, and aircraft generate and retain heat, and as such, are especially visible in the infrared wavelengths of light compared to objects in the background.

Besides vehicle engines and people what other objects create and retain heat?
What is the answer?
ANS: unanswerable
QUES: Not all boys who pass the College election examination choose to become King's Scholars. If they choose instead to belong to one of the 24 Oppidan Houses, they are known as Oppidan Scholars. Oppidan scholarships may also be awarded for consistently performing with distinction in School and external examinations. To gain an Oppidan Scholarship, a boy must have either three distinctions in a row or four throughout his career. Within the school, an Oppidan Scholar is entitled to use the letters OS after his name.

How do King's Scholars get awarded with scholarships?
What is the answer?
ANS: unanswerable
QUES: On January 17, 1961, Eisenhower gave his final televised Address to the Nation from the Oval Office. In his farewell speech, Eisenhower raised the issue of the Cold War and role of the U.S. armed forces. He described the Cold War: "We face a hostile ideology global in scope, atheistic in character, ruthless in purpose and insidious in method ..." and warned about what he saw as unjustified government spending proposals and continued with a warning that "we must guard against the acquisition of unwarranted influence, whether sought or unsought, by the militaryindustrial complex."

On what date did Eisenhower deliver his farewell speech?
What is the answer?
ANS:
January 17, 1961