9 A mercury thermometer is kept at the focus of a concave

Last updated: 6/11/2023

9 A mercury thermometer is kept at the focus of a concave reflector behind its bulb as shown in the figure and in front of an electric furnace Which of the following combinations will cause the smallest reading of the thermometer Thermometer Radiation Electric Furnce Reflector 1 Black reflector and black bulb 2 Black reflector and shiny bulb 3 Shiny reflector and shiny bulb 4 Shiny reflector and black bulb