Question

(b) Fill in the blanks in each of the following statements with the word red, the word violet, the word infrared, the word ultraviolet, or the phrase don’t know.(i) For the lower-temperature blackbody, in the visible range (from red to violet) the blackbody emits more __________ light than it does __________ light. Hence to the naked eye the color of the light emitted by this lower-temperature blackbody will be __________, even though the frequency at which this blackbody emits most strongly is in the __________ part of the electromagnetic spectrum that the human eye cannot detect.(ii) For the higher-temperature blackbody, in the visible range (from red to violet) the blackbody emits more __________ light than it does __________ light. Hence to the naked eye the color of the light emitted by this higher-temperature blackbody will be __________, even though the frequency at which this blackbody emits most strongly is in the __________ part of the electromagnetic spectrum that the human eye cannot detect.

*k Range of visible frequencies 11 Violet t Red 11 IL Blackbody spectrum for higher temperature Intensity per frequency interval Il Blackbody || spectrum for || lower temperature Frequencyf 0

Answer 1

Here we use Wien displacement law  

1) For low temp range : emit more red than it does Violet light. Hence color will be red .infrared region

2) For high temperature range : emit more violet than it does red light. Even though the frequency at which this Blackbody emits most strongly is in the infrared region.