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प्रश्न
State two advantages and two disadvantages of the reflecting periscope.
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उत्तर
Advantages of Reflecting Periscope:
- It is used to see above the head of crowds.
- It is used by soldiers in trench warfare.
Disadvantages of Reflecting Periscope:
- The final images is not brightly illuminated as light energy is absorbed due to two successive reflections.
- Any deposition of moisture of dust on the mirror reduces the reflection almost to nil, and hence, the periscope cannot be used in places where there is a lot of dust or moisture.
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संबंधित प्रश्न
Write true or false of the following statement.
The image formed by a plane mirror is real
You are standing at a distance of 2 meters from a plane mirror.
What is the distance between you and your image?
Explain the following term:
Reflected ray. Draw diagram/diagrams to show them.
Draw diagrams to show the difference between regular and irregular reflection.
Compare the characteristics of an image formed by a convex mirror and a concave mirror, when object is beyond center of curvature, but not at infinity.
Identify the following kind of beam of light.
The word PLATE written on a paper is held in front of a plane mirror. Write down the letters as seen in the following case.
The paper is held parallel to the mirror.
Which of the following can make a parallel beam of light when light from a point source is incident on it?
