Question

Which of the following cannot be used for the measurement of time?

• A. A leaking tap
• B. Simple pendulum
• C. Shadow of an object during the day
• D. Blinking of eyes

Answer 1

The correct option is A

A leaking tap

The explanation of the correct option (A):

A leaking tap is can not be used for the measurement of the time because one can not estimate when will the drop fall.

The explanation for the incorrect options (B), (C), and (D):

1. The to and fro motion of a simple pendulum shows time.
2. The shadow of the object was used in old days to estimate the position of the sun or time.
3. Blinking of eyes is rarely seen which blinks by time unless by reflex actions.

Therefore, option A is correct.