Question

The measurement of small time intervals became possible with the development of

• A. sand clock
• B. sundial
• C. pendulum clock
• D. water clock

Answer 1

The correct option is C

pendulum clock

Explanation for correct option:-

(C) A pendulum clock is used to measure small time intervals. A simple pendulum consists of a small metallic ball (bob) suspended from a rigid stone by a thread.

Explanation for incorrect option:-

(A) A sand clock measures the passage of time. It has two connected vertical glass bulbs allowing a regulated trickle of material from top to bottom.

(B) A sundial tells the time of day when there is sunlight by the apparent position of the sun in the sky.

(D) Water clock also called clepsydra is an ancient device for measuring time by the gradual flow of water.

Hence, option (C) is correct.