explain how the shadow is formed
Answers
Answer:
Shadows are made by blocking light. Light rays travel from a source in straight lines. If an opaque (solid) object gets in the way, it stops light rays from traveling through it. This results in an area of darkness appearing behind the object which is the shadow.
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Answer:
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Explanation:
How is shadow formed?
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Shadows are formed due to the rectiliner propagation of light i.e shadows are formed because light travels in straight lines . I should point out that this is a simplified view as demonstrated by diffraction where light does bend around sharp corners. Also, in order for light to travel in a straigt line, it has to travel in vacum or a homogeneous/even medium. Light will bend, as it does when the medium changes and light enters at non-right angle. Or when the medium is uneven, like air close to ground on a hot day. Than there is gravity. According to General Theory of Relatively, mass warps space time and thus light will travel in a "curved" line.
From the question, i am guessing that the person who asked the question is young and/or has not read a lot abt physics yet. So appologies for the extra information.
Shadows are formed when light encounters an object which it cannot pass through and thus get blocked. Because the light became blocked, the area behind it will be in darkness, which we call a shadow.
Another person has already pointed out that for shadows to form, two things are needed viz. a light source and an object to block the light. I want to add that we need a third viz. a screen, for most of what we usually call a shadow; although this is not required as far as physics/optics is concerned. Only when we see the absence of light falling on the screen do we call it a shadow.
It may also be pointed out that for us to notice that it is a shadow, call it a shadow, some of the light need to come through and either form an outline of the blocking object, or atleast trace a part of its edge. If none of the light gets through, we usually do not notice it and do not call it a shadow. For example, at night, we are in the earth's shadow but no one hardly ever says so.