Kaleidoscope

Q.

What is the working principle, construction and application of periscope?

Q. Which of the following is used in a Kaleidoscope?

1. Plane mirrors
2. Concave mirrors
3. Convex mirrors
4. Lenses

Q. The image formed in a periscope is ________.

1. real with laterally inverted
2. virtual with laterally inverted
3. real without laterally inverted
4. virtual without laterally inverted

Q.

How many images of a candle will be formed if it is placed between two parallel plane mirrors separated by 40 cm? Explain the concept in Kaleidoscope. [3 MARKS]

Q. Question 15
Two mirrors meet at right angles. A ray of light is incident on one at an angle of ${30}^{\circ }$ as shown in Fig. 16.19. Draw the reflected ray from the second mirror.

Q. Which of the following instruments, can be used to form patterns like below?

1. Microscope

2. Telescope

3. Periscope

4. Kaleidoscope

Q. A tube containing three or more plane mirrors inclined at certain angles to each other is called a ___.

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

Q.

Question 4

A tiny mirror M is fixed on a piece of cardboard placed on a table. The cardboard is illuminated by light from a bulb. The position of eye with respect to position of bulb is shown in the figure as A, B, C and D. In which position mirror will be visible?




(a) A
(b) B
(c) C
(d) D

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

Q.

The principle of successive reflections of light at inclined mirrors are used in

1. periscope

2. telescope

3. microscope

4. kaleidoscope

Q.

How many images of a candle will be formed if it is placed between two parallel plane mirrors separated by 40 cm? Explain the concept in Kaleidoscope. [3 MARKS]

Q. In which of the following device, multiple images are formed by plane mirrors?

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

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

Q. Codes consisting of light and dark marks which may be optically read is known as _____________.

1. Bar code
2. Decoder
3. All of the above
4. None of the above
5. Mnemonics

Q. Kaleidoscope uses the concept of _____ of light.

1. single reflection
2. multiple reflections
3. refraction
4. dispersion

Q. Which of the following devices make use of the phenomenon of multiple reflection?

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

Q. The image formed in a periscope is ________.

1. real with laterally inverted
2. virtual with laterally inverted
3. real without laterally inverted
4. virtual without laterally inverted