How to tell if a mirror is two way or not

                               A two-way (2 way) mirror is glass which, on one side, provides a reflection, but on the other side, functions as a window. It is used to observe people so that they are not aware that they are being watched, or who is watching them. Two-way mirrors (also known as one-way, transparent, and observation mirrors) are common in police stations or psychological institutions, but there are other, less obvious settings where people worry about being watched, such as dressing rooms and workplaces. If you are concerned about a particular mirror, here's how to tell if there's someone looking on the other side.

Steps

1. Observe how the mirror is installed. A normal mirror is hung against the wall, but an observation mirror is set into the wall. If the wall is behind the mirror, it's probably a normal mirror.
2. Turn off the lights and hold a flashlight or even a small personal flashlight to the mirror. If it is a two-way mirror, the room on the other side will be illuminated.
   
3. Press your eyes against the mirror and cup them with your hands, creating a dark "tunnel" to block out the light. When you do so, the light in the observation room will be brighter than the light on your side of the mirror, and you should be able to see something beyond the glass.
   
4. Tap on the surface of the mirror with your knuckle. A normal mirror will produce a dull sound because it is placed in front of a wall. A two-way mirror, however, will produce an open, hollow, and reverberating sound, because there is an open space on the other side.
   

Tips

                                The "fingernail" test most commonly associated with identifying two-way mirrors is not as reliable as any of the methods above. It can be performed by putting your fingernail against the mirror. If there is NO gap between your nail and the reflection, you are touching a first-surface mirror. These are quite expensive and would not be installed under ordinary circumstances.

                              Not all observation mirrors are first surface mirrors, and not all first surface mirrors are observation mirrors. 

                              Also known as half-silvered mirrors, two-way mirrors or observation mirrors work equally well when illuminated from either side. What matters is which side has the greater illumination not which side is silvered. There is also no reason an observation mirror can't be surface mounted on a wall just like a real mirror. It need not be mounted in the wall like a window.

Source:- WikiHow

The National Flag of India.

                                 Every free nation of the world has its own flag. It is a symbol of a free country. The National Flag of India was designed by Pingali Venkayyaand and adopted in its present form during the meeting of Constituent Assembly held on the 22 July 1947, a few days before India's independence from the British on 15 August, 1947. It served as the national flag of the Dominion of India between 15 August 1947 and 26 January 1950 and that of the Republic of India thereafter. In India, the term "tricolour" refers to the Indian national flag.
                         In the national flag of India the top band is of Saffron colour, indicating the strength and courage of the country. The white middle band indicates peace and truth with Dharma Chakra. The last band is green in colour shows the fertility, growth and auspiciousness of the land.The three bands of colors are in equal proportions. While in the center of the white band is a wheel in navy blue.
                               This wheel is an adaptation from the sculpted wheel, called Chakra, the wheel of law, appearing on the abacus of Sarnath Capital of Asoka, the ancient Indian emperor. It has 24 spokes and the diameter approximates the width of the white band. The chakra intends to show that there is life in movement and death in stagnation.   

                              With all these things the width and length of the Tricolor is supposed to be in the proportion of 2:3 .                                                                      
                        The flag was designed as a symbol of freedom. Its use and display are, however, regulated by a code.
                              On 26th January 2002, the Indian flag code was modified and after several years of independence, the citizens of India were finally allowed to hoist the Indian flag over their homes, offices and factories on any day and not just National days as was the case earlier. Now Indians can proudly display the national flag any where and any time, as long as the provisions of the Flag Code are strictly followed to avoid any disrespect to the tricolour. 
                              For the sake of convenience, Flag Code of India, 2002, has been divided into three parts. 
                              Part I of the Code contains general description of the National Flag. 
                              Part II of the Code is devoted to the display of the National Flag by members of public, private organizations, educational institutions, etc. 
                             Part III of the Code relates to display of the National Flag by Central and State governments and their organisations and agencies.  
                             There are certain dos and don'ts laid down for common people regarding Indian flag.

• When the National Flag is raised the saffron color band should be at the top.
• No flag or emblem should be placed either above the National Flag or to its right.
• All other flags to be placed to the left of the National Flag if they are hung in a line.
• When the National Flag is carried in a procession or parade, it shall be on the marching right or in front of the center of the line, if there is a line of other flags.
• Normally the National Flag should be flown over important government buildings like the Rashtrapati Bhawan, the Parliament House, the Supreme Court of India, the High Courts, the Secretariats, the Commissioners' office etc.
• The National Flag or any imitation of it must not be used for purpose of trade, business, or profession.
• The National Flag should always be taken down in the evening at sunset.

                               

The Do's:

• A member of public, a private organization or an educational institution may hoist/display the National Flag on all days and occasions, ceremonial or otherwise consistent with the dignity and honour of the National Flag.
• Section 2 of the new code accepts the right of all private citizens to fly the flag on their premises.

The Don'ts

• The flag cannot be used for communal gains, drapery, or clothes. As far as possible, it should be flown from sunrise to sunset, irrespective of the weather.
• The flag cannot be intentionally allowed to touch the ground or the floor or trail in water. It cannot be draped over the hood, top, and sides or back of vehicles, trains, boats or aircraft.
• No other flag or bunting can be placed higher than the flag. Also, no object, including flowers or garlands or emblems can be placed on or above the flag. The tricolour cannot be used as a festoon, rosette or bunting.

  
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The National Emblem of India