Physics Measuring Instruments

A sextant is a navigational instrument used to measure the angle between two visible objects, primarily for determining latitude by measuring the altitude of celestial bodies above the horizon. It was crucial for maritime navigation before GPS. An altimeter measures altitude above sea level, a spherometer measures curvature, and a spectrometer analyzes light spectra.

A picometer is a unit of length equal to 10⁻¹² meters, not a measuring instrument. The other options, barometer (atmospheric pressure), thermometer (temperature), and hygrometer (humidity), are all actual devices used to measure physical properties.

An anemometer is the meteorological instrument specifically designed to measure wind speed. Altimeters measure altitude, chronometers measure time precisely, and dosimeters measure radiation exposure. The root 'anemo' relates to wind.

An instrument used for measuring temperature, especially body temperature, is a thermometer.

An anemometer is the instrument used for measuring wind speed. It works by capturing the force or velocity of wind and converting it into a measurable value. A barometer measures pressure, a hygrometer measures humidity, and a thermometer measures temperature.

Phytotron is a device for growing plants in controlled environment.

Hygrometer measures humidity (water vapor content) in air. Calorimeter measures heat quantities, pyrometer measures high temperatures (especially in furnaces), and hydrometer measures liquid density/specific gravity.

This is the correct option. Electroscope is used to detect whether an object is electrically charged or not.

This is the correct option. Seismograph is an instrument that measures and records the magnitude of an earthquake in terms of the shock waves it produces.

Ganong's potometer is used for the measurement of transpiration.

A hygrometer is specifically designed to measure relative humidity (the amount of water vapor in air compared to the maximum it can hold at that temperature). Maximum-minimum thermometers measure temperature range, rain gauges measure precipitation, and stethoscopes are medical instruments for listening to body sounds.

A stethescope is tool which doctors and nurses use to listen to the internal sounds of the body such as the heart, lungs and bowel sounds.

Lichenometry is a technique used to determine the age of exposed rock surfaces based on the size of lichen thalli. 

A seismometer is the scientific instrument used to detect and record the intensity, direction, and duration of seismic waves from earthquakes or explosions. Barometers measure air pressure, hydrometers measure liquid density, and altimeters measure altitude.

Bolometer is a temperature transducer used for the measurement of minute quantities of radiant heat.