The formation of spectrum (band of seven colours) shows that white sunlight is made up of seven colours. We will notice that our image in the plane mirror has head on the top and feet at the bottom just like us. (3) The image formed in a plane mirror is the same distance behind the mirror as the object is in front of it. Lightly score it with a craft knife to divide it into four sections, then fold it into a box and tape together. (3) A periscope is used by a navy officer sitting in a submarine to see ships over the surface of water in the sea (even though the submarine itself may be submerged under water). The two distances will be the same if the mirror is angled at 45º. (1) A periscope consists of a long tube T having two plane mirrors M1, and M2 fitted at its two ends. Question 4 Explain how a hair dresser makes you see hair at the back of your head after the hair cut is complete? A periscope is a long, tubular device through which a person can see objects that are out of the direct line of sight. 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. 2. 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. Thanks to all authors for creating a page that has been read 688,270 times. When that reflected light hits the second mirror it is reflected again at 45°, right into your eye. The two mirrors work together to create a periscope. Expanding Educational Opportunities. The light coming from hair at the back of head is reflected by this small mirror on to a big mirror which is in the front of the person. The periscope was also used in gun turrets and other armed vehicles during WWI. 1A11. (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. (4) There are two holes in the periscope tube: one hole is in front of the top mirror M1 and other hole is in front of the bottom mirror M2. 7) A kaleidoscope produces hundreds of ever-changing coloured patterns (or designs). X To make a cardboard periscope, first cut the tops off 2 empty quart-sized milk cartons. To create this article, 99 people, some anonymous, worked to edit and improve it over time. A periscope works on the reflection of light from two plane mirrors arranged parallel to one another. Then, tape the cartons together to make one long box. Periscope Data provides organizations with up-to-date and interactive dashboards with pivot tables and drag-and-drop filters to drill down. You can make small mirrors out of an old CD, but wear gloves and eye protection to protect yourself from splinters, and work under adult supervision. A military submarines main weapon is the torpedo. One mirror captures the image while the other reflects it back into your eye. Chat (offline) Sears Parts Direct. We know ads can be annoying, but they’re what allow us to make all of wikiHow available for free. 2. A periscope is an optical instrument that uses a system of prisms, lenses, or mirrors to reflect images through a tube. These mirrors are placed parallel to the surface. It can be seen only by looking into the plane mirror. Final image is not brightly illuminated as some amount of light energy is absorbed by two successive reflections. This article has been viewed 688,270 times. Small Business Network Setup Diagram. And if we lift our right hand, then our image in the plane mirror appears to lift its left hand. This device is used in submarines to view what is going on above and below water surface. Kaleidoscope we can never see the same pattern again. (2) The image in a plane mirror is the same distance behind the mirror as the object is in front of it. wikiHow is a “wiki,” similar to Wikipedia, which means that many of our articles are co-written by multiple authors. Question 11 What happens when a beam of light is passed through a glass prism? an object. It can be used to see above the heads of crowd. turn your periscope upside down. Formation of Image, Periscope, Kaleidoscope. The light rays coming from the object fall on the plane mirror M1. You can learn how to make a kaleidoscope by following the instructions in this wikiHow article: Include your email address to get a message when this question is answered. Periscopes under Bureau of Ships Specifications R20 P5 of 15 June 1940, are of the following types: 1. You can find PVC pipe at a hardware store or home improvement store. Heat the CD first with a hair dryer to make it less brittle, then score lightly and repeatedly with a craft knife until it is cut into the shape you want. Allow a thin beam of sunlight (coming through a tiny hole in the window) to fall on the prism.We will see that the beam of white sunlight splits on entering the glass prism and forms a broad patch of seven colours (called spectrum) on the white screen placed on the other side of prism. To learn how to make a periscope from PVC pipe, keep reading! Draw a diagram of your periscope including the path a ray of light would follow as it travels through your periscope design -- from an object, through the periscope, and into your eye or a camera. seven colours. Periscope definition is - a tubular optical instrument containing lenses and mirrors by which an observer obtains an otherwise obstructed field of view. For 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. If you are using a cardboard tube instead of a milk carton, flatten it slightly so you can trace the mirror. 6) If we turn the kaleidoscope tube slightly, the glass pieces will rearrange and produce a new pattern. 1. She has started this educational website with the mindset of spreading Free Education to everyone. Adulting 101: Learn How to Raise Your Credit Score. Don't use glue yet, since you might need to make adjustments to the mirror's position. Every time a new pattern is formed. (2) The two plane mirrors are fitted in such a way that they are parallel to one another and their reflecting surfaces face each other. (1) A periscope is used to see over the heads of a crowd. (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). Draw a diagram of the path a ray of light follows as it travels from an object, through the periscope, and into your eye.
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