IAS Interview Question Part 6

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Q. (1) Why do Doctors wear green/blue dress inside operations theatre?

Image Why Do Doctors Wear Green/Blue Dress Inside Operations …
  • Scrubs used to be white the colour of cleanliness. Then in the early twentieth century, one influential doctor switched to green because he thought it would be easier on a surgeon՚s eyes. And it is hard to confirm whether green scrubs became popular for this reason, green may be especially well-suited to help doctors see better in the operating room because it is the opposite of red colour.
  • Green could help physicians see better for two reasons. First, looking at blue or green can refresh a doctor՚s vision of red things, including the bloody innards of a patient during surgery. The red signal in the brain actually fades, which could make it harder to see the organ of the human body. Looking at something green from time to time can keep someone՚s eyes more sensitive.
  • Second, such deep focus on red, red can lead to distracting green illusions on white surfaces.

Q. (2) Why soap foam is always white?

Why Soap Foam is Always White
  • When we wash our hands, apart from mixing soap with water, we also mix air. In its effort to avoid contact with air and in order to isolate it, the water creates bubbles, in other words foam.
  • This explains the round shape of the bubbles. In addition the color of the foam always tends to be white, even in the case of colored soaps.
  • This is due to the fact that bubbles store within them relatively more air than soap material. The colour of the natural light is white. What we actually see is the reflection of the natural light in the bubble, which is white.
  • However, if we for instance happen to be in a room with red lighting the foam might look reddish.
  • And another reason is the ultra-thin layer of soap is pretty much transparent on its own, but the foam looks white, because visible light gets scattered in multiple directions after passing through several surfaces.

Q. (3) Do you know why Indian highways have coloured milestones?

Do You Know Why Indian Highways Have Coloured Miles …
  • Different colors milestones have different meaning and not all roads have the same milestones. The color code varies for the national highway, state highway and district roads.
  • Milestone yellow and white colour represents national highway.
  • Milestone green and white colour represents state highway.
  • Milestone blue/black and white colour represents city/districts.
  • Milestone red and white colour represents rural roads.

Q. (4) Why buttons on coat sleeves?

Why Buttons on Coat Sleeves
  • During the Napoleonic wars Napoleonic wars napoleon wants his troops should be neat and clear in appearance.
  • Because of the more cold in Europe, troops used to wipe their nose from the arms of the coat.
  • Because of which the coat were very dirty, to prevent the coat from being filthy, napoleon ordered to put the buttons on the coat arms.
  • So that if the nose is wiped after applying the button then the nose will be scared to peel.
  • Another reason coat arm side should not be cutoff while working on a table.

Q. (5) Why shouldn՚t we use steel utensils in a Microwave?

Why Shouldn՚t We Use Steel Utensils in a Microwave
  • Microwave functions on the magnetrons. This technology, produce very short, high frequency radio waves 2.5 gigahertz. That frequency is just appropriate for being absorbed by water, fat and sugar molecules within organic matter.
  • Microwaves cook food from the outside in. non – reactive, non- metal vessels of ceramic, plastic, or glass do not consume radio waves at that frequency and as a result don՚t heat up very much in the microwave.
  • Metal (Steel) on the other hand, actually reflects microwave energy. that՚s why the inside of every microwave it is essential a secure utensils.
  • When we heat up a hot pocket, its pouch has a thin layer of aluminum lining that is designed to absorb the microwaves and heat up a bit to brown the outside of the hot pocket.
  • Plus, the inside walls of your microwave oven are made of metal which traps the microwaves inside the box, so that they cook the food and not things around the microwave oven.
  • Microwave window also has metal mesh lining it.

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