Periscope

Q.

What are a multiple images? How they are formed?

Q.

How is the phenomenon of reflection used in making a kaleidoscope? What are the applications of a kaleidoscope?

Q.

The phenomenon of multiple reflections is the working principle of which object?

1. Magnifying lens

2. Periscope

3. Microscope

4. Spectacles

Q.

How matrix is used in real life

Q.

Question 5

A small hole P is made in a piece of cardboard. The hole is illuminated by a touch as shown in the figure. The pencil of light coming out of the hole falls on a mirror.



At which point should the eye be placed, so that the hole can be seen?

Q. The device which is used in submarianes to see the objects which are above the surface of water is:

1. Periscope
2. Telescope
3. Kaleidoscope
4. Microscope

Q. A periscope uses two plane mirrors as shown below.


Will an image formed by it be laterally invered? Justify. [2 marks]

Q.

a ______ is an instrument used to view objects above the surface.

Q. How periscope and kaleidoscope used to get total internal reflection by arranging the mirrors??

Q. Which among the following is use of periscopes?

1. It is used used in the submarines for observation purpose.
2. It is used to make symmetric patterns.
3. It is usedto magnify the view of object.
4. It is used for looking at things that are extremely far.

Q. The image of the word EARTH as seen from the periscope would appear as:

1. 
2. 
3. 
4. 

Q. Define the working principle of a periscope using a diagram.
$\left[4\text{marks}\right]$

Q. A ______ is an instrument used for observing objects from a hidden position.

1. Microscope
2. Telescope
3. Periscope
4. Kaleidoscope

Q. Periscope is made using ______ mirror.

1. concave
2. diverging
3. convex
4. plane

Q. The instrument that can be used to see things from a concealed position

1. Microscope
2. Kaleidoscope
3. Telescope
4. Periscope

Q. In a simple periscope, the two plane mirrors are to each other.

1. parallel
2. perpendicular
3. at ${45}^{\circ }$

Q.

When a light ray is incident on one of the two mirrors that are placed at right angle to each other, what can be said about the final reflected ray? It is given that the plane of incident ray and the the two normals is same.

1. It is parallel to the incident ray and is in the same direction as that of the incident ray

2. It is parallel to the incident ray and is in the opposite direction as that of the incident ray

3. It is perpendicular to the incident ray and is in the same direction as that of the incident ray

4. It is perpendicular to the incident ray and is in the opposite direction as that of the incident ray

Q. Which of the following is employed to clearly view objects which cannot be seen directly due to obstruction?

1. A laser
2. A periscope
3. A kaleidoscope
4. A sting ray

Q. Which kind of mirrors are used in making a periscope?

1. Concave
2. Diverging
3. Plane
4. Convex