Hello Guys, Today we are going to explore about two-way mirrors. When you are in hotel room, changing room of shop, or any unknown places ! Your sixth sense may warn you but you don’t find anyone around ! May be some one is watching you through the Two-way mirrors !!! So, now question is what is two-way mirror ? how it is different from normal mirror ?
and How to detect it ? First of all lets have a look at normal mirror>It seems normal, the reflection is normal too! Now lets have a look at two way mirror>Ohk So, what is the main difference between these two mirrors ? Lets see back side of these mirrors ! Normal mirror >It has non-transparent layer on back side. Two way mirror>It has partially-transparent layer on back side Now question is ; If layer is partially-transparent then how can this glass behave as a mirror ? How does two way mirror work ? Human eyes detects any object as a mirror if it reflects 70% of the lights !!! That is why we can see mirrors on road with rain water ! Here is trick behind two-way mirrors; A thin reflective layer which reflects 75% of the lights and let 20% lights pass through layer is pasted on Glass. With this trick Human detects it as a normal mirror. Now How to detect two-way mirrors? Lets take one example that there is one mirror in Hotel room ; Now how to decide that is it two way mirror or not ? We have two models>one with normal mirror and another with two-way mirror. Method 1. Light Test In this test we will use our mobile phone’s camera and light. Turn off your room lights and go close to mirror. Start your mobile camera with Torch on it. Go close to mirror till your mobile phone touch it. If you see nothing on camera>it means it is normal mirror. If you see other side off mirror on mobile screen>it means it is two-way mirror! If you find any privacy problems in unknown places ; you can contact to your local police. Method 2. Glass test (not accurate method) In this test we check for reflection distance. This method is not so much accurate because it depends on production methodology. In production of normal mirrors>there is One glass layer on reflective layers so when you place your finger on normal glass>you can not touch your own reflection because of glass layer. While in two way mirror>there is no glass layer on reflective layer so you can touch your reflection. Method 3. Sound Test As we know Two way mirror has a hollow portion behind it to see through the mirror. So, when we knuckle-up on two way mirror it will give us dull or hollow like a sound. And in normal mirror it will give us solid sound. Two-way mirror has benefits too ! Police use it in investigation room ! so they can see the person but person can not see them. Two way mirror are also used in Home and office window and doors ; so person who is inside of it can see out-world without exposing their privacy. But Two way mirror has one dis-advantage also ; ; it behaves as a mirror to light source ! so at a day time it seems mirror at outside and at a night it behaves as a mirror inside of home and people can see you from out-side ! so it is better to curtain-on at night. 90% of Hidden cameras are placed behind two-way mirrors so, be aware; and check all the mirrors at unknown places ! if you find anything wrong contact authority or police ! Be aware | Stay safe
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