Shadows are longest when the light source (sun) is lowest in the sky (sunrise/sunset). 7:30 PM is closest to sunset (if late summer) or already dark. Assuming daylight, early morning or late evening gives max shadow. The official key selected this option.
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62. Lunar eclipse occurs on
(A) the first day of the lunar month (B) the last day of the lunar month (C) a full moon day (D) any of these given days
Answer:
(C) a full moon day
Explanation:
A lunar eclipse can only happen during a full moon when the Earth is between the Sun and Moon.
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63. Imagine yourself standing between a lamp and wall. If you move towards wall your shadow will
(A) increase in size (B) decrease in size (C) remain the same size (D) disappear
Answer:
(B) decrease in size
Explanation:
As you move closer to the screen (wall) and further from the light source, the shadow becomes smaller and sharper.
