Knowledge N Fact4u

We are able to see an object when light from those objects enter our eyes and hit the retina of our eye.But when we blink, our retina doesn't receive any light. THEN WHY DOESN'T IT APPEAR DARK? 😕😕😕 Because our brain suppresses this information from retina,ignoring the darkness.Thus,we don't consciously realize that it has gone dark. Also,expert say,a part of our brain called Medial Prefrontal Cortex, stores the last image we see before blinking and uses it to fill in the darkness.Thus, we feel that we are watching a continuous picture,without interpretation. In addition to this,if we blink while watching a moving object,our brain gauges the difference in positions of the moving object,before and after the blink.Accordingly,it adjust our eye muscle,helping them to maintain focus on the moving object,even after the blink.  

Here telecom operator are very clever, b ecause telecom operators want to earn money of 13 months instead of 12 months. Let do the calculation and find out why telecom operators are offering 28 days validity. Each month they get 2 days more, therefore in a year they get additional 24 days. There are 7 month which has 31 days so they get additional 7 days.Now in case of February  ,it has only 28 days not 30. So the total number of days they get are=24+7-2=29 days. So if you recharge 12 times then more 29 days are left in a year.🤔🤔 Means for another 29 days you have to recharge from that telecom operator.😫😫 So you have to recharge 13 times in a year instead of 12 times in a year. So telecom operators provide 28 days validity only. First one telecom operator started and then another telecom operators also understood this concept and they also applied 28 days validity both in data packs and voice packs.😱😱😱