Question

Doctor has prescribed a lens having power +1.5 D. What will be the focal length of the lens? What is the type of the lens and what must be the defect of vision? (Ans: +0.67m, farsightedness) , Solve the example

Answer 1

Any kind of disaster can occur in an extremely crowded place. If the place is overcrowded than the space could handle then there is a possibility for congestion which will lead every person in the crowd to sense difficulty in breathing.

If he person cannot breathe for long time he will lead to death eventually or to the unconsciousness state. This will end as a huge massacre if a group of people get stranded in the crowd and cannot be able to move. 

Answer 2

hope it will help you