Shadow Effects
I'm guessing: Another name is the "Hallo Effects."
If you know someone who regularly drops names of famous people as if they met them yesterday over coffee, they are insinuating their own social status to those who they mention.
In cinematography the effect of associating one thing with another can be affected by Juxtaposition or Montage, or both.
Juxtaposition is when two things are placed side-by-side to imply association. Newspapers use this often to insinuate a relationship between an American political figure and a terrorist, even though the stories are printed completely independent of one-another. They appear on the front page, above the fold, together.
Montage is a series of images or video clips that subconsciously tell a story in the minds of the audience. Depending entirely on the order of the images or clips, an idea can be created in the mind of the audience, completely independent of the individual components, which can avoid legal proceedings.
Another applicable term is "Tertium Quid" somewhat like "greater than the sum of its parts."
A shadow is an area where direct light from a relatively small Source is blocked by some opaque object. If the source is genuinely the only light around, the shadow will be absolutely black, and will have no colour.
In practice, there are almost always other sources of light, because light is reflected from other objects, or scattered by dust particles in the atmosphere. The direct light casts the shadow, but the shadow is lit dimly by the reflected or scattered light, and so is not dead black. If the scattered light has a colour, like the blue of the sky, then the shadow will take on that colour. This is most easily seen on snow lit with brilliant sunshine; if you look carefully, the shadows are distinctly blue, in real life or in photographs.
Another situation where you can see a coloured shadow is during a total eclipse of the moon. The Earth’s shadow is considerably bigger than the moon, but the moon does not disappear in the sky; light from the Sun is scattered into the shadow by the Earth’s atmosphere. For the same reason that the setting sun is red, the scattered light is predominantly red, and the moon hangs in the sky looking spectacularly red.
Another place to see coloured shadows is where objects are being illuminated by numerous distinct coloured lights, such as typical rock band lighting. Each light source casts a shadow, but other light sources are throwing shadows in different places. If you look where the shadows partially overlap, you can see lots of different colours, each caused by the absence of one colour and the admixing of others.
In general, shadows DO have colours.
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.
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.
Source - Quara
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