Mercury is a toxic substance and is very difficult to dispose of if a thermometer breaks. These days, which of the following thermometers is widely used?

Digital thermometer

The correct answer is option 2. Digital thermometer.

Digital thermometers, unlike traditional mercury thermometers, use electronic sensors to measure temperature. These sensors can detect temperature changes and convert them into electrical signals that are then displayed digitally. Digital thermometers are safer and more environmentally friendly than mercury thermometers because they do not contain toxic substances like mercury.

Clinical thermometers are designed for measuring body temperature, and digital versions are commonly used in healthcare settings. Digital thermometers are also widely used in various industries, laboratories, and for personal use at home. They provide accurate and quick temperature readings without the safety concerns associated with traditional mercury thermometers. Additionally, digital thermometers often come with features such as memory storage, easy readability, and the ability to switch between Fahrenheit and Celsius scales.