The phrase "cast a shadow over something or someone" means why?

Important Related MCQs:

• A flagstaff 17.5 m high casts a shadow of length 40.25 m. The height of the building, which casts a shadow of length 28.75 m under similar conditions will be?
• A rhetorical figure of repetition in which the same word or phrase is repeated in (and usually at the beginning of) successive lines, clauses, or sentences is?
• Ahmad stands at point D, 2m in front of a spotlight at point A. He is 1.6m tall and is facing the wall of a building which is 10.5m away from him. How tall (BC) is his shadow on the wall of the building
• An action is right if it maximizes good for the self, This phrase refers to?
• An observer at a point on the earth where only the penumbra region of moon's shadow will move past, will observer a _____?
• At a particular time shadow of a pole 40 m long is measured to be 30m. If the length of a plaza is 200 m then how long would the shadow be at about the same time?​
• The angle of elevation of the sun, when the length of the shadow of a tree is equal to the height of the tree is?
• The book KHAKI SHADOWS is written by?
• The day to sleep is Saturday. The 'To sleep' infinitive phrase functions as?
• The figure of speech in which two words or phrases of opposite significance are set together for effect is called?