19 - University Physics with Modern Physics

Question

How many times does a typical person blink her eyes in a lifetime?

Step-by-Step Solution

Answer

A person blinks 672768000 times in a lifetime

Number of average blink per day

A normal person blinks on an average of 16 times per minute.

The number of time a person blink in one year will be,

 $$\begin{gathered} n=16\frac{times}{min}\times \frac{60 min}{1 hr}\times \frac{24 hr}{1 day}\times \frac{365 day}{1 year} \\ n=8409600 times/year \end{gathered}$$

Number of blinks in a lifetime

Considering the life of an average person is 80 years, then the number of blinks in whole life will be,

$$\begin{gathered} n=80 year \times 8409600 times/year \\ n= 672768000 times \end{gathered}$$ 

Thus, a person blinks 672768000 times in a lifetime.