How is the Image Formed by a Spherical Mirror?<\/a><\/li>\n<\/ul>\nMultiple Reflections<\/strong> \nHave you wondered what kind of images we would get if we had two such mirrors? You might be thinking that when one plane mirror forms one image, then two plane mirrors together will , form two images. However, this is not true. By varying the angle between the two mirrors, we can get any number of images. Let us see how a combination of plane mirrors works. \n For example, if we keep two plane mirrors at an angle of 90\u00b0 to each other, we will get three images. As we decrease the angle between the mirrors, the number of images will increase. When the two mirrors are parallel to each other (angle 0\u00b0), we get an infinite number of images. You might have observed this in many places. Some elevators (lifts) have mirrored walls. If you try to look at yourself in one mirror, which has a parallel mirror on the opposite wall, you will see that there are an infinite number of images! head by using two mirrors.\u00a0Have you ever tried to look at the back of your head in a mirror? If you have, you will know that you need two mirrors to be able to see the back of your own head. This is again a case of multiple reflections of light.<\/p>\nAim:<\/strong> To observe the images formed with two plane mirrors when they are placed at different angles to each other. \nMaterials needed:<\/strong> Two plane mirrors and a small object (like a pen cap) \nMethod:<\/strong><\/p>\n\nKeep the two mirrors side by side so that they are in a straight line.<\/li>\n Place the small object (pen cap) in front of the mirrors. How many images do you see?<\/li>\n Now reduce the angle between the two mirrors slowly. Observe the images.<\/li>\n<\/ol>\nObservation:<\/strong> When you keep the two mirrors side by side, you will see only one image as the two mirrors together act as one. You will see that as soon as you reduce the angle between the mirrors, two images appear. When the angle is reduced further, you will get three images. As the angle between the mirrors is reduced further, more and more images can be seen. \nExtension:<\/strong> Start again from the beginning (i.e., the two mirrors in a straight line) and hold the mirror still when the second image just begins to appear (two full images, not two disjointed images). Hold the mirrors at this position and ask a friend to trace the outline of the base of the mirrors. Remove the mirrors and measure the angle with a protractor. Repeat this for three, four, and five images. Make a table as shown below.<\/p>\n The number of images (N) formed with two plane mirrors kept at an angle ‘a’ to each other is\u00a0given by the formula N = (360\/a) – 1. Check to see if this formula holds true.<\/p>\n","protected":false},"excerpt":{"rendered":"
Image Reflection by a Plane Mirror Can you think of a plane reflecting surface? The mirror on the dressing table is a good example of a plane reflecting surface. Any smooth polished surface that can reflect the rays of light and form a clear image is called a mirror. Any highly polished metal surface, e.g., … Read more<\/a><\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"spay_email":""},"categories":[404],"tags":[1456,2969,1454,1455],"yoast_head":"\nImage Reflection by a Plane Mirror - CBSE Library<\/title>\n \n \n \n \n \n \n \n \n \n \n \n \n \n \n\t \n\t \n\t \n