List three types of thermometer
1. Mercury-in-glass thermometer: This type of thermometer consists of a bulb filled with liquid mercury connected to a glass tube. As the temperature increases, the liquid mercury expands and rises up the tube, indicating the temperature on a scale.
2. Digital thermometer: This is an electronic thermometer that uses a digital display to show the temperature. It contains a temperature sensor that converts the temperature into electrical signals, which are then processed and displayed digitally.
3. Infrared thermometer: Also known as a non-contact thermometer, this type of thermometer measures temperature by detecting infrared energy emitted by an object. It does not require physical contact to measure temperature and is commonly used for non-invasive measuring of body temperature or for checking the temperature of objects at a distance.