Must Do Series on Different type of Measuring Instruments (Part - 2)

Dear Readers,

We are providing "Must Do series" for the competitive exam on different topics and subjects. Students can go through these topics , as it will help students to understand the concepts easily and remember it for longer period of time.  

1.Fathometer :
A depth finder Instrument that uses sound waves to determine the depth of water.

2.Geiger Counter :
Instrument for recording the amount of radiation emitted by a source of radio-activity.