![]() ![]() PeriscopeĪn optical instrument (or device) in which reflected light is periscope.Ī periscope is a long, tubular device through which a person can see objects that are out of the direct line of sight.īy using a periscope, we can see the objects on the other side of a high wall which cannot be seen by us directly. The reflected rays of the first plane mirror become incident rays for the second plane mirror. If the rays of light reflected by a plane mirror are incident on another plane mirror, then the reflected rays are reflected again. Our image in the plane mirror is laterally inverted (or sideways reversed). This means that the left side of our body becomes the right side in the mirror image whereas the right side of our body becomes left side in the mirror image. And if we lift our right hand, then our image in the plane mirror appears to lift its left hand. Change of sides of an object and its mirror image is called lateral inversion.įor example : If we stand in front of a plane mirror and lift our left hand, then our image in the plane mirror appears to lift its right hand. In an image formed by a plane mirror, the left side of object appears on the right side in the image whereas the right side of object appears on the left side in the image. (5) The image in a plane mirror is laterally inverted, we mean that the image in a plane mirror is sideways reversed with respect to the object. We will notice that our image in the plane mirror has head on the top and feet at the bottom just like us. (4) The image of an object in a plane mirror is erect, we mean that the image in plane mirror is the same side up as the object, the top of object is the top of image and bottom of object is the bottom image.įor example : If we look into a big plane mirror, we will see the image of our whole body. (3) The dimensions of image are exactly the same as that of the object. The image is neither enlarged (neither bigger than the object) nor diminished (nor smaller than the object).įor example : If a person is 1.75 metre tall, then his image in the plane mirror will also be exactly 1.75 metre tall. We mean that if a person is standing at a distance of 1 metre in front of a plane mirror, then his image will be formed at the same distance of 1 m behind the plane mirror. (2) The image in a plane mirror is the same distance behind the mirror as the object is in front of it. Our image seen in the plane mirror cannot be formed on a screen placed behind the plane mirror. Our image in the plane mirror is virtual (or unreal). It can be seen only by looking into the plane mirror.įor example : When we look into a plane mirror, we see the image of our face. ![]() (1) Image formed by a plane mirror is virtual, we mean that the image formed by a plane mirror cannot be obtained on a screen. (6) The image in a plane mirror is laterally inverted. (5) The image formed by a plane mirror is erect (4) The image formed in a plane mirror is of the same size as the object. (3) The image formed in a plane mirror is the same distance behind the mirror as the object is in front of it. (2) The image formed by a plane mirror is behind the mirror. (1) The image formed by a plane mirror is virtual (or unreal). 2 Reflected Light can be reflected againĬharacteristics of Image Formed by a Plane Mirror.1 Characteristics of Image Formed by a Plane Mirror.Repeat steps 5–7 for your fourth prediction and observation, using all three mirrors.Repeat steps 5–7 for your third prediction and observation, using two mirrors.Remember to take a picture if you are using a digital camera, or making a drawing. ![]() Do you see more, the same, or fewer reflections than you did with zero mirrors? Record your observations in the second row of the data table.Look into the kaleidoscope, which now has one mirror exposed.Write down your prediction in the second row of your data table.When you look into the kaleidoscope with one mirror, do you think you will see more, the same, or fewer reflections than you did with zero mirrors?.Remove the kaleidoscope's eyepiece and pull out one piece of paper, uncovering a mirror.If you do not have a camera, you can make a drawing of what you see. If you are using a digital camera, get an adult to help you take a picture through the kaleidoscope's eyepiece.Do you see any reflections? Write down your observation in the first row of your data table. ![]() It will help if you aim the kaleidoscope at a plain background, like a wall or a piece of paper. Write down your prediction in the first row of your data table.When you look into the kaleidoscope, do you think you will see any reflections? Don't look just yet!.Now you are ready to make your first prediction.Push a piece of black cardstock into the tube, lengthwise, until it completely covers one mirror. ![]()
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