Many objects do appear black or white when light falls on them. If they are black, it means that the object is absorbing all wavelengths of visible light and not reflecting any. If they are white, it means that they are reflecting all wavelengths of visible light and not absorbing any. The color of an object is due to the wavelengths of light that it reflects.
Blue is hot yellow is not
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This applies not only to opaque objects. The basic idea is that white light is a mixture of different colors, and objects tend to reflect the different colors - the components of white light - in different proportions. For example, an object that reflects most of the red light but not much of the other colors will look red.
A telescope.
When you paint a room, white makes the room appear to be larger. Horizontal stripes also make a room appear larger.
Many objects do appear black or white when light falls on them. If they are black, it means that the object is absorbing all wavelengths of visible light and not reflecting any. If they are white, it means that they are reflecting all wavelengths of visible light and not absorbing any. The color of an object is due to the wavelengths of light that it reflects.
Blue is hot yellow is not
Since blue objects absorb the green light, the objects appear black.
Perspective.
The answer is Linear Perspective.
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Celestial objects such as the sun appear to rise in the east and set to the west.
...The simple answer is that white balance adjusts camera color response so that a white object in life appears white to the camera. Various sources of illumination may cause white to appear bluish or reddish. White balance settings add or subtract needed colors to force white objects to record as white objects. The idea is that if white is made to look white, other colors will also look correct in the digital picture. For example, objects viewed under fluorescent lighting tend to appear bluish in a picture. With the proper color correction using a white balance setting, objects will appear true to color without a bluish cast. ...In reality, it is sometimes difficult to completely correct color casts and automatic white balance settings do not always give the best results. Mixed source illumination is sometimes difficult to control. One way to check white balance is to look at a white card in your viewer and change white balance settings until the card actually looks white. Post color correction using software can also help make this correction.
This applies not only to opaque objects. The basic idea is that white light is a mixture of different colors, and objects tend to reflect the different colors - the components of white light - in different proportions. For example, an object that reflects most of the red light but not much of the other colors will look red.
Convex lens makes objects appear closer and corrects hyperopia (far-sightedness).
Green objects would appear green and red objects would appear very dark.