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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
Copy the figure. By taking two rays from point A, show the formation of image. State four characteristics of the image.
Identify the following kind of beam of light.
State whether the following statement is true or false. If false, correct it.
The angle of incidence is the angle made by the incident ray with the plane mirror.
By geometrical construction, find the position of the image in the following figure.
What is reflection of light?
Beams of light are incident through the holes A and B and emerge out of box through the holes C and D respectively as shown in the Figure Which of the following could be inside the box?
Total internal reflection will occur if the angle of reflection is ______.
Play with a mirror
Write your name with a sketch pen on a thin sheet of paper, polythene or glass. Read your name on the sheet while standing in front of a plane mirror. Now look at your image in the mirror.
