Who is considered to be the father of radio astronomy ?
Karl Jansky
Who measured air pressure in the atmosphere ?
Galileo
Who devised the system of seismography ?
Robert Mallet
Who devised the roll film photography ?
George Eastman
Which is used measuring the atmospheric pressure at a place ?
Barometer
Which is instrument is used for recording the intensity of earthquake ?
Seismograph
Which instrument is used to study the behavior of vibrating strings ?
Sonometer
Which instrument is used for measuring depth of ocean ?
Fathometer
Which instrument is used for measuring curvature of a surface ?
Spherometer
What is chronometer measure ?
Time while on ships
Which instrument is used for measuring the altitude of sun ?
Sextant