Problemas
Question 6 of 10 Which three characteristics make iron a good blackbody radiator? A. It changes color when exposed to EMR that heats it. B. It absorbs much of the EMR it receives. C. It does not emit EMR when hot. D. It emits several different wavelengths of EMR.
Roztwór
Antonio
veterano · Tutor durante 9 años
3.6
(276 Votos)
Respuesta
### A. It changes color when exposed to EMR that heats it.### B. It absorbs much of the EMR it receives.### D. It emits several different wavelengths of EMR.
Explicación
## Step 1: Define a Blackbody### A blackbody is an idealized physical body that absorbs all incident electromagnetic radiation (EMR) and emits EMR based on its temperature.## Step 2: Identify Relevant Characteristics### Characteristics B, D, and A are relevant to a blackbody.## Step 3: Evaluate Option A### Option A states that iron changes color when exposed to EMR that heats it. This is true because blackbodies radiate differently based on their temperature, and these changes are often visible as changes in color.## Step 4: Evaluate Option B### Option B states that iron absorbs much of the EMR it receives. This is true because blackbodies are perfect absorbers and emitters of radiation, so they do absorb much of the EMR they receive.## Step 5: Evaluate Option D### Option D states that iron emits several different wavelengths of EMR. This is true because blackbodies emit a continuous spectrum of wavelengths, not just a single one.## Step 6: Evaluate Option C### Option C is not true because it states that iron does not emit EMR when hot. This is incorrect because blackbodies, when heated, do emit EMR.