Periscope And Kaleidoscope
Periscope And Kaleidoscope
We know that plane mirror reflects light falling on it. This reflected ray can act as incident ray for another mirror. This process of reflection of light several times between reflecting surfaces is known as Multiple reflection of light.
Periscope:
This instrument works on the principle of multiple reflection. A periscope is a tool we use to see things that would otherwise be hidden or obstructed or not in the direct line of sight.
Construction: A reflecting periscope consists of a tube bent twice at right angles. It is provided with two openings and two plane mirror fixed at at the two bends of the tube.. The mirrors are aligned parallel to each other at a angle with the addition of two simple lenses.
Working: The rays of light from the object enter the periscope from one tube (Upper tube in the figure), gets reflected twice and enters the eye of the person looking through the periscope.
Uses of periscope:
Kaleidoscope :
In this toy beautiful patterns are formed due to multiple reflections. It works on the principle of multiple reflection in inclined plane mirrors. It is a long tube containing mirror and piece of colored glass or paper whose reflection produces changing patterns when tube is rotated.
Kaleidoscope
Construction: Three plane mirrors inclined at an angle of to each other are fixed inside a cylindrical box. A few pieces of coloured glasses are placed inside the box. One end of the cylindrical box has a transparent opening through which a person can view.
Which of the following are correct : (a) Periscope is the instrument which works on the principle of multiple reflection. (b) In periscope, the mirrors are aligned parallel to each other at a 600 angle with the addition of two simple lenses. | |||
| Right Option : A | |||
| View Explanation | |||
This process of reflection of light several times between reflecting surfaces is known as ________________________ . | |||
| Right Option : A | |||
| View Explanation | |||
Periscope is the instrument which works on the principle of _______________________. | |||
| Right Option : C | |||
| View Explanation | |||
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8thIn terms of methodology I want to say that institute provides expert guidence and results oriented monitering supplements by requsite study material along with regular tests which help the students to improve their education skills.The techniques of providing education helps the students to asses...
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10thAbhyas institute is one of the best coaching institute in the vicinity of Ambala cantt.The institute provides good and quality education to the students.The teachers are well experienced and are very helpful in solving the problems. The major advantages of the institute is extra classes for weak...
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9thAbhyas institute is one of the best coaching institute in the vicinity of Ambala Cantt area. The teachers of the institute are well experienced and very helpful in solving the problems of the students.The good thing of the institute is that it is providing extra classes for the students who are w...
Aman Kumar Shrivastava
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