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Describe the construction of a Kaleiodeo...

Describe the construction of a Kaleiodeoscope.

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Kaleidoscope is an optical instrument used to see a number of beautiful patterns. It is made up of a circular cardboard tube or of a thick chart paper in which rectangular mirror strips are joined together to form a prism. At one end of the tube, touching these mirrors, a circular plane glass plate is fixed and several small pieces of coloured glass (broken pieces of coloured bangles) are placed upon it. This end is closed by ground glass plate and beautiful patterns are seen through the other end of the kaleidoscope.
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NAND LAL PUBLICATION-LIGHT-EXERCISES
  1. Suppose you are in a dark room. Can you see objects in the room? Can y...

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  2. Differentiate between regular and diffused reflection. Does diffused r...

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  3. Mention against each of the following whether regular or diffused refl...

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  4. State the laws of reflection.

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  5. Describe an activity to show that the incident ray, the reflected ray,...

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  6. Fill in the blanks in the following: A person 1 m in front of a pla...

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  7. Fill in the blanks If you touch your ………ear with right hand in front...

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  8. Fill in the blanks The size of pupil becomes………… when you in dim lig...

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  9. Fill in the blanks Night birds have ……………cones than rods in their ey...

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  10. Describe the construction of a Kaleiodeoscope.

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  11. Draw a labelled sketch of the human eye.

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  12. Gurmit wanted to perform activity 16.8 using a laser torch . Her teach...

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  13. Explain how can you take care of your eyes.

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  14. What is the angle of incidence of a ray if the reflected ray is at an ...

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  15. How many images of a candle will be formed if it is placed between two...

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  16. Two mirrors meet at right angles. A ray of light is incident on one at...

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  17. Bhooja stands at A just on the side of a plane mirror as shown in figu...

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  18. Find out position of the image of an object situated at A in the plane...

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  19. When Paheli moves from B to C, where does the image of A move?

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