Perfect Black Bodies And Radiation (physics Only) (GCSE Physics)

The sun’s surface (~5800 K) peaks in visible light and a cooler object (~300 K) peaks in infrared. This difference is explained by

If a black body’s absolute temperature is 290 K, the peak of its emitted spectrum is about 10 micrometres (µm). If its temperature were raised to 580 K (double), the peak would be about

Which statement about the cosmic microwave background (CMB) as a black-body spectrum is correct?

Which surface behaves most like an ideal black body for infrared radiation?

A perfect black body at temperature T has a continuous emission spectrum. Which statement is true?

The Stefan–Boltzmann concept (qualitative) states that for black bodies, the total radiated power per unit area is proportional to the fourth power of absolute temperature. Which consequence follows?

A body with high emissivity at infrared wavelengths placed in a cold room will

Which statement about emission and absorption for a perfect black body is correct?

For a grey body with emissivity 0.5 at temperature 600 K, and s the Stefan–Boltzmann constant, the emitted power per unit area is

Wien’s displacement idea (qualitative) says the peak wavelength of black-body radiation is inversely proportional to temperature. Which sentence matches that law?

Which of these best describes Kirchhoff’s law in words?