Related questions How do I determine the molecular shape of a molecule? What is the lewis structure for co2? What is the lewis structure for hcn?
How is vsepr used to classify molecules? What are the units used for the ideal gas law? How does Charle's law relate to breathing? What is the ideal gas law constant? Reflection is when light bounces off an object. If the surface is smooth and shiny, like glass, water or polished metal, the light will reflect at the same angle as it hit the surface. This is called specular reflection.
Diffuse reflection is when light hits an object and reflects in lots of different directions. This happens when the surface is rough.
Most of the things we see are because light from a source has reflected off it. For example, if you look at a bird, light has reflected off that bird and travelled in nearly all directions. If some of that light enters your eyes, it hits the retina at the back of your eyes. An electrical signal is passed to your brain, and your brain interprets the signals as an image. The angle at which light hits a reflecting surface is called the angle of incidence, and the angle at which light bounces off a reflecting surface is called the angle of reflection.
If you measure the angle of incidence and the angle of reflection against the normal, the angle of incidence is exactly the same as the angle of reflection. With a flat mirror, it is easy to show that the angle of reflection is the same as the angle of incidence. When light from an object is reflected by a surface, it changes direction.
It bounces off the surface at the same angle as it hits it. Smooth, shiny surfaces such as mirrors and polished metals reflect light well. Dull and dark surfaces such as dark fabrics do not reflect light well. Shiny objects do not absorb or scatter wavelengths. Instead, the shiny surface reflects mirror-like images to the observer.
Whether the surface is smooth, rough, or curved affects those reflections. When this reflected light rays enter our eyes, we can see an image of the object in the smooth surface. If we place a candle in front of a plane mirror, then the smooth and shining mirror surface produces a regular reflection of light coming from the candle due to which we can see an image of the candle in the mirror.
The smooth surface of still water in a lake causes regular reflection of light and produces image of various objects like trees, buildings in water. There are two types of images that can be formed with light :.
The image which can be obtained on a screen is called a real image. For example: The image formed on a cinema screen. The image formed in a pinhole camera. A real image is formed when light rays coming from an object actually meet at a point after reflection from the mirror. A real image can be formed on a screen because the light rays actually passes through it. Real images can be formed by a curved mirror known as concave mirror. The images which cannot be obtained on a screen is called a virtual image.
The image of our body formed by a plane mirror cannot be received on a screen, it can be seen only by looking into the mirror.
If we put a screen behind the plane mirror, we will not see anything on it. There are no light rays behind the mirror. The image are not really there at all. Virtual images are also called unreal images. A virtual image is formed when light rays coming from an object appears to meet after reflection from the mirror.
It is not possible to obtain a virtual image on screen because light rays actually do not pass through it. Highly polished metal objects also form virtual images. We see the reflections of trees ,buildings and other objects in the still water of a lake or pond. These reflections of objects in water are virtual images.
A type of curved mirror known as convex mirror also forms only virtual image. Concave mirror can form a virtual image only when the object is very close to it. Virtual image of ourselves which we see when we look into the plane mirror is the same side up as we are, the images is of same size and images of same distance behind the mirror as we are in front of it if.
If we stand in front of a big plane mirror ,we see the image of our body in it.
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