The shorter the lifetime of the excited state, the greater the uncertainty in the energy of that excited state. This is unaffected by changes in temperature. List two types of thermal transducers and explain how they work. When two different metals come in contact, a potential develops. This potential or voltage varies with temperature.
Thermistors are resistors whose resistance varies with temperature.
Thermal transducers are used with IR and microwave light because they don't have enough energy to free an electron as in the photoelectric effect. Thermal transducers are slow and not terribly sensitive. Cesium is used extensively in photocells an in television cameras because it has the lowest ionization energy of all stable elements. What is the velocity of a photoelectron ejected from cesium by 500. Note that if the wavelength of the light used to irradiate the cesium is longer than 660.