876: Suppose a rocketship is receding from the earth at a speed of 2/10th the velocity of light. A light in the rocketship appears blue to the passengers on the ship. What colour would it appear to an observer on the earth?
(a) Blue
(b) Orange
(c) Yellow
(d) Yellow-orange
877: Under the Constitution of India, which one of the following is not a fundamental duty?
(a) To safeguard public property
(b) To abide by the Constitution and respect its ideals
(c) To vote in public elections
(d) To develop the scientific temper
878: The Speaker can ask a member of the House to stop speaking and let another member speak. This phenomenon is known as
(a) decorum
(b) crossing the floor
(c) interpellation
(d) yielding the floor
879: On a half-moon night the angle between the moon and the sun when measured from earth is about
(a) 45°
(b) 60°
(c) 90°
(d) 180°
880: 'Project Loon', sometimes seen in the news, is related to
(a) waste management technology
(b) wireless communication technology
(c) solar power production technology
(d) water conservation technology