Sun’s temperature is measured by

The Sun’s temperature is measured by; option [C] pyrometer thermometer. Pyrometers are specifically designed to measure high temperatures, making them suitable for determining the Sun’s temperature. One common type of pyrometer used for solar temperature measurement is the optical pyrometer. Optical pyrometers determine temperature by comparing the brightness or color of the light emitted by the object being measured to that of a calibrated filament or standard light source. By adjusting the filament’s temperature until it matches the brightness or color of the Sun, the temperature of the Sun can be inferred. This method is based on the principles of blackbody radiation and Wien’s displacement law.
Another technique for measuring the Sun’s temperature involves using spectroscopy. Spectroscopic measurements analyze the Sun’s electromagnetic spectrum to determine its temperature based on the distribution of emitted radiation across different wavelengths. By examining spectral lines corresponding to various atomic or molecular transitions, scientists can derive the Sun’s temperature.
Both pyrometer-based methods and spectroscopic techniques provide valuable insights into the Sun’s thermal characteristics, contributing to our understanding of solar physics and astrophysics.