Advertisements
Advertisements
प्रश्न
State two advantages and two disadvantages of the reflecting periscope.
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.
APPEARS IN
संबंधित प्रश्न
Write true or false of the following statement.
The image formed by a plane mirror is real
Fill in the blank
The image formed by a plane mirror is at a distance behind the mirror as ________
Select the correct alternative
A man standing in front of a plane mirror finds his image to be at a distance of 6 meter from himself. The distance of man from the mirror is
You are standing at a distance of 2 meters from a plane mirror.
What is the distance of your image from the mirror?
If the angle between the mirror and the reflected ray is 23∘, what is the angle of incidence of the incidence ray?
State three ways in which the image formed in a plane mirror differs from the image formed in a pin hole camera.
Total internal reflection will occur if the angle of reflection is ______.
