Measuring Time

Unit of time (second) is defined in SI units in terms of:-

One second is defined as equal to

Which is the most accurate clock ?

ls there any specific reason for using $\mathrm{Cesium}-133$ atom for defining one second?

What are types of clocks present based on the display?

Give some examples of some non-luminous objects.

Define the term sundial.

Name a few time measuring devices.

Convert $1$ day to seconds.

Do atomic clocks really work?

What is atomic time on a clock?

 How did ancient people who built sundials know that it was noon based on the sun's location?

Atomic standard time is based on: 

To measure short intervals of time, we use a stopwatch.

What are the units of time?

What are the uses of Atomic clock?

Types of Clocks Based on Working Mechanism.

How does a pendulum clock work?

What are the two types of clocks based on their working mechanism?

What is analog clock?